Unicentric Castleman disease is a rare condition in which one lymph node or one group of nearby lymph nodes becomes enlarged. It may cause no symptoms at first, or it can lead to a painless lump, pressure, tiredness, fever, or weight loss depending on where it is. Many people first hear about Unicentric Castleman disease after a scan, exam, or surgery done for another reason. It can affect adults of many ages, and it often lasts until the affected lymph node is removed. Treatment is usually surgery, and the outlook is often very good because Unicentric Castleman disease is not usually fatal when it is fully removed.
How many people live with Unicentric castleman disease?
Worldwide, there is no single trusted estimate for how many people are living with unicentric Castleman disease. In the United States, about 30,000 people are thought to be living with Castleman disease overall (Castleman Disease Collaborative Network, 2024), and because unicentric disease is estimated to make up roughly 50% to 75% of cases, this suggests about 15,000 to 22,500 people in the U.S. may be living with unicentric Castleman disease; this is an estimate, not a direct count (Castleman Disease Collaborative Network, 2024).
Overview
Unicentric castleman diseaseSymptoms
Many people with unicentric Castleman disease have no symptoms at first. When symptoms happen, they often come from one enlarged lymph node pressing nearby tissues, causing a lump, fullness, cough, or pain. Some also feel tired or run a low fever.
Outlook and prognosis
The outlook for unicentric Castleman disease is usually very good, especially when the enlarged lymph node can be fully removed. Many people are cured with surgery alone and go on to live a normal life, though follow-up visits help check for rare return.
Causes and risk factors
For unicentric Castleman disease, the exact cause is usually unclear, but abnormal immune signaling, especially too much interleukin-6, may play a role. Risk factors are not well defined, and it is not usually linked to inherited, lifestyle, or environmental causes.
Genetic influences
For unicentric Castleman disease, genetics usually are not the main cause. Most cases are not inherited, and no single gene change explains most people’s disease, though rare genetic differences may affect how lymph node cells grow.
Diagnosis
Unicentric Castleman disease is usually suspected when imaging shows one enlarged lymph node. Doctors confirm the diagnosis of Unicentric Castleman disease with a lymph node biopsy, often alongside blood tests to rule out other causes.
Treatment and drugs
Unicentric Castleman disease is usually treated by surgically removing the enlarged lymph node, which often relieves symptoms and is the main treatment. If surgery is not possible, radiation therapy may be used, and follow-up checks help watch for recurrence.
Symptoms
Many people with unicentric Castleman disease feel completely well at first and only learn something is wrong after a scan or exam finds a swollen lymph node. When symptoms do happen, they are usually caused by one enlarged lymph node pressing on nearby tissues rather than widespread illness. The early symptoms of unicentric Castleman disease can be easy to miss because they often depend on where that lymph node is located. Symptoms vary from person to person and can change over time.
Many people with unicentric Castleman disease have no noticeable symptoms at all. It may be found by chance during imaging, surgery, or a routine physical exam.
A swollen lymph node may show up as a lump in the neck, armpit, or groin, or it may sit deeper in the chest or belly where you cannot feel it. When it is near the skin, the lump is often painless and grows slowly.
A larger lymph node can press on nearby structures and cause discomfort, a feeling of fullness, or pain. In daily routines, this might show up as small but noticeable changes.
If the enlarged node is in the chest, some people develop a cough, chest pressure, or shortness of breath. These symptoms can be more noticeable when walking quickly, climbing stairs, or taking a deep breath.
How people usually first notice Unicentric castleman disease?
Many people first notice unicentric Castleman disease when a doctor finds a single enlarged lymph node or mass by chance during an exam, chest X-ray, ultrasound, or CT scan done for something else. When symptoms do show up, the first signs of unicentric Castleman disease are often caused by that one enlarged node pressing on nearby tissues, which can lead to a painless lump, a feeling of fullness, cough, shortness of breath, or belly or chest discomfort depending on where it is. Less often, people with unicentric Castleman disease may first notice more general symptoms like fatigue, fevers, night sweats, or unplanned weight loss, but these are usually less prominent than in multicentric Castleman disease.
Types of Unicentric castleman disease
Unicentric Castleman disease can look quite different from one person to the next, even though it involves just one enlarged lymph node or one group of nearby lymph nodes. Some people feel completely well and only learn about it after a scan or surgery for something else, while others notice pressure, pain, or symptoms caused by a lump pressing on nearby structures. In practice, the main types of unicentric Castleman disease are based on how the affected tissue looks under the microscope, and those patterns can go along with milder or more noticeable symptoms. Symptoms don’t always look the same for everyone.
Hyaline vascular
This is the most common type of unicentric Castleman disease and is often found by chance because it may cause few or no symptoms. When symptoms do happen, they are more often related to the mass itself, such as fullness, discomfort, cough, or trouble caused by pressure on nearby tissues.
Plasma cell
This type is more likely to cause symptoms that affect the whole body, not just the area of the enlarged lymph node. Many living with this form may notice tiredness, fever, night sweats, weight loss, or abnormal blood test results along with a localized mass.
Mixed type
This less common variant has features of both major patterns under the microscope. For many, this can mean symptoms that overlap, with some people mainly noticing a local lump while others also have more general inflammatory symptoms.
Can I slow down the onset of symptoms?
Probably not. Right now, there is no good evidence that diet, exercise, sleep, or other lifestyle changes can meaningfully delay the start of symptoms in unicentric Castleman disease, a rare condition that usually affects just one lymph node area; healthy habits still support overall health, but they have not been shown to prevent this condition. There are also no standard screening tests or preventive medicines for people who feel well, but if a new lump, pressure, or other symptoms appear, getting checked early can help because removing the affected lymph node often treats the disease very well.
What genetics can tell you about symptoms
For people with unicentric Castleman disease, genetics usually does not tell doctors much about which symptoms will happen, how severe they will be, or when they will start. This form affects just one group of lymph nodes, and symptoms often depend more on where that enlarged node sits in the body, or whether it makes extra inflammatory signals, than on an inherited gene change. In most cases, it is not considered a genetic disorder passed through families, although researchers are still studying whether changes in the affected tissue may play a small role in some people.
Causes and risk factors
The exact cause of unicentric Castleman disease is often unclear. It may involve abnormal immune signals that make one lymph node or one nearby group of lymph nodes grow too much. Unlike multicentric Castleman disease, unicentric Castleman disease is usually not linked to HIV or HHV-8 infection. Researchers are still learning how these pieces fit together. It is not usually inherited, and no clear lifestyle or environmental risk factors for unicentric Castleman disease have been proven.
What are the most common causes or risk factors?
For unicentric Castleman disease, the exact cause is usually not known, although experts think the immune system’s growth signals may become too active in one lymph node and make it grow too much. It is not usually passed down in families, so inherited gene changes are not thought to be a common cause. There are also no strong, proven lifestyle or environmental risk factors, and unlike the more widespread form of Castleman disease, this type is usually not tied to infections such as HIV.
Environmental and biological risk factors
Unicentric Castleman disease is rare, and the exact cause is still not clear. Unlike many more common conditions, the risk factors for unicentric Castleman disease are not well defined. Researchers are still exploring how outside influences interact with our inner biology.
No specific environmental exposure has been proven to raise the risk of unicentric Castleman disease. Most cases happen without a clear outside trigger.
Unlike some forms of multicentric Castleman disease, unicentric Castleman disease is usually not linked to HIV or HHV-8 infection. These viruses are not considered established risk factors for the unicentric form.
Unicentric Castleman disease can happen at almost any age, but it is often found in younger to middle-aged adults. Age may influence when it is discovered, but it does not strongly predict who will develop it.
Males and females can both develop unicentric Castleman disease, and no strong sex-based pattern has been confirmed. Sex is not considered a major biological risk factor.
Genetic risk factors
For many living with unicentric Castleman disease, a common worry is whether it runs in families. Based on what is known today, the genetic causes of unicentric Castleman disease are still unclear, and most cases are not inherited. Unlike some conditions that are traced to a single gene passed down through a family, unicentric Castleman disease usually happens sporadically. Researchers are still studying acquired DNA changes in the affected lymph node, but no inherited genetic risk factor has been firmly established.
Inherited genes: No inherited gene change has been proven to cause unicentric Castleman disease. Most people with this condition do not have relatives with the same diagnosis.
Sporadic pattern: Unicentric Castleman disease usually appears as an isolated case rather than a condition passed through generations. For many, this means there is no clear genetic explanation in the family tree.
Family history: A family history of unicentric Castleman disease is not a recognized genetic risk factor. Having a relative with unicentric Castleman disease does not usually mean your own risk is high.
Acquired changes: Researchers are studying DNA changes that may arise only in cells within the affected lymph node. These acquired changes are different from inherited ones because they are not present in every cell of the body and are not passed from parent to child.
Lifestyle risk factors
Current evidence has not show clear lifestyle habits that cause unicentric Castleman disease. When people ask about lifestyle risk factors for unicentric Castleman disease, the main medical point is that day-to-day habits appear more relevant to symptom burden, treatment tolerance, and recovery than to the disease starting in the first place. Because this condition is usually localized and often treated with surgery, lifestyle factors matter most around general health and healing.
Smoking is not a known cause of unicentric Castleman disease. It can raise inflammation, impair lung function, and slow wound healing after surgery or other procedures. Quitting may support safer treatment and recovery.
Heavy alcohol use is not an established trigger for unicentric Castleman disease. It can worsen sleep, nutrition, liver function, and medication tolerance during evaluation or treatment. Limiting alcohol may help the body recover more reliably.
Lack of exercise has not been shown to cause unicentric Castleman disease. Low activity can reduce stamina, muscle strength, and overall resilience before and after treatment. Regular movement may help energy levels and recovery if symptoms allow.
No specific diet is known to lead to unicentric Castleman disease. Inadequate protein, low calorie intake, or a highly unbalanced diet can make fatigue worse and slow healing after surgery. Good nutrition supports immune function and tissue repair.
Risk prevention
Unicentric Castleman disease usually cannot be prevented in a proven way because the exact cause is often unclear. For many living with unicentric Castleman disease, prevention is mainly about lowering the chance of missed diagnosis, growth of the affected lymph node, or treatment delays. Prevention is about lowering risk, not eliminating it completely.
Early symptoms of unicentric Castleman disease can be easy to brush off, especially if there is just one enlarged lymph node or a feeling of fullness in the chest or belly. Getting persistent swelling or pressure symptoms checked can help catch unicentric Castleman disease before it causes more problems.
A lump in the neck, armpit, groin, or abdomen that does not go away should be assessed rather than watched for months. Prompt imaging or referral can reduce delays and may make treatment simpler if unicentric Castleman disease is present.
If a scan has already shown a single enlarged lymph node, regular follow-up helps doctors see whether it is stable or growing. Prevention works best when combined with regular check-ups.
Ongoing fatigue, fevers, night sweats, unexplained weight loss, or pressure-related symptoms deserve medical attention even if they seem mild at first. These symptoms are not specific to unicentric Castleman disease, but checking them early can lower the risk of missed or late diagnosis.
Can you prevent Unicentric castleman disease?
No, there is no known way to prevent unicentric Castleman disease. It usually appears without a clear cause, and experts have not found lifestyle changes, foods, or medicines that are proven to stop it from happening. If someone develops symptoms or an enlarged lymph node, getting checked early can help with diagnosis and treatment, but it does not prevent the condition itself.
Transmission
Unicentric Castleman disease is not contagious, so it does not spread from one person to another through coughing, kissing, sex, blood, food, or everyday contact. For many living with Unicentric Castleman disease, this means there is no risk of “catching” it from someone else or passing it to family members in daily life.
People also ask about how Unicentric Castleman disease is inherited, but it is usually not thought to be passed from parent to child. In most cases, it appears to happen as a one-time, localized problem in a single group of lymph nodes rather than an infection or a family-linked condition.
When to test your genes
For unicentric Castleman disease, genetic testing is not usually part of early detection because this condition is typically not inherited and often arises in just one lymph node area. Testing may be considered only if your history suggests another inherited condition or if your care team needs to rule out a different diagnosis.
Diagnosis
Unicentric Castleman disease is often found when one lymph node, or one group of nearby lymph nodes, stays enlarged or shows up on a scan done for another reason. Doctors usually begin by asking about symptoms such as a painless lump, pressure in the chest or belly, or less often fatigue, fever, or weight loss, because the diagnosis of unicentric Castleman disease depends on showing that the disease is limited to one area. Imaging and a tissue sample are usually needed, since other conditions can look similar at first.
A clinician asks when the swelling was first noticed and whether there are symptoms such as pain, fever, night sweats, weight loss, or pressure on nearby organs. The exam also looks for enlarged lymph nodes elsewhere, which can help tell unicentric Castleman disease from forms that affect multiple areas.
Blood tests may check for inflammation, anemia, kidney and liver function, and signs of infection. These tests cannot confirm unicentric Castleman disease on their own, but they help rule out common conditions and show whether the illness seems limited or more widespread.
CT scans, and sometimes MRI or PET scans, are used to locate the enlarged lymph node and see its size and exact position. These scans also help doctors look for lymph node changes in other parts of the body before treatment is planned.
The most important step is removing all or part of the abnormal lymph node so it can be examined under a microscope. This is how doctors confirm the diagnosis and separate unicentric Castleman disease from lymphoma, infection, or other growths.
How is Unicentric castleman disease diagnosed?
Doctors usually suspect unicentric Castleman disease when an imaging test such as a CT scan shows one enlarged lymph node, or one group of nearby lymph nodes, often after someone notices a lump or pressure in the chest or belly. Blood tests may help rule out infections, cancers, and other causes, but the diagnosis is usually confirmed by taking out all or part of the swollen lymph node, a small gland that helps fight infection, and examining it under a microscope. Genetic testing is not usually needed to diagnose unicentric Castleman disease.
Stages of Unicentric castleman disease
Unicentric Castleman disease does not have defined progression stages. This is because it usually affects one lymph node or one group of nearby lymph nodes, rather than moving through a predictable step-by-step pattern over time. Doctors usually start with a conversation about symptoms such as a lump, pressure, or tiredness, but many living with unicentric Castleman disease have no symptoms and find it during a scan or exam done for another reason. Diagnosis is usually confirmed with imaging and then a biopsy, which is also how doctors sort out possible early symptoms of unicentric Castleman disease from other causes of swollen lymph nodes.
Outlook and prognosis
The outlook for unicentric Castleman disease is generally excellent because the abnormal lymph node growth is confined to a single site and can often be completely removed with surgery. After full surgical excision, most people are cured and have a normal life expectancy, with recurrence being uncommon. When surgery is not feasible because of the tumor’s location, treatments such as radiation therapy or careful monitoring may still provide good long-term control, although symptoms can persist in some cases. Mortality from unicentric Castleman disease is low and is usually related not to the disease itself but to rare complications, mass effect on nearby organs, or problems from treatment. Regular follow-up is still important to confirm there is no regrowth and to evaluate any ongoing inflammatory symptoms.
Long-term effects
For many people, unicentric Castleman disease has a very good outlook because it usually affects just one lymph node or one group of nearby nodes. If that area can be removed with surgery, many living with unicentric Castleman disease go on to have little or no ongoing disease activity. The long-term picture is often shaped more by where the enlarged node was located, whether it was fully treated, and whether it had been pressing on nearby organs or blood vessels before treatment. When treatment is incomplete or surgery is not possible, some long-term effects can still happen and follow-up may be needed over time.
Most people with unicentric Castleman disease do very well after the affected lymph node is fully removed. In many cases, treatment is curative and life expectancy is close to normal.
A large lymph node can cause lasting problems if it has been pressing on nearby tissues for a long time. Depending on the location, this may mean ongoing discomfort, fullness, cough, shortness of breath, or swelling even after treatment.
Long-term effects can sometimes relate to the operation rather than the disease itself. These may include scar pain, stiffness, numbness, or reduced function if the mass was close to nerves, the chest, or the abdomen.
Some people continue to feel tired or unwell for a while, especially if they had inflammation before treatment. Not every long-term effect means the disease is still active, but symptoms that linger should be checked.
How is it to live with Unicentric castleman disease?
Living with unicentric Castleman disease often means dealing with uncertainty at first, because many people feel well for a long time and only learn about it after a swollen lymph node is found on an exam or scan; others may notice fatigue, discomfort, or pressure symptoms depending on where the enlarged node sits. Day to day, the biggest disruption is often the testing, appointments, and worry before treatment, but because unicentric disease is limited to one area, many people do very well after the affected lymph node is removed and can return to usual routines. For family and close friends, the condition can bring stress, practical help with visits and recovery, and understandable fear when the diagnosis is new, yet the outlook is often much more reassuring than people expect once the disease has been fully evaluated and treated.
Treatment and drugs
Unicentric Castleman disease is usually treated by removing the affected lymph node or growth with surgery, and for many people this is the main treatment they need. When the whole area can be safely taken out, symptoms often improve quickly and the disease may be cured. If surgery is not possible because of the location or nearby vital structures, radiation therapy may be used to shrink or control the growth. Treatment often looks different for each person, and some people with unicentric Castleman disease may also need medicines for inflammation or symptoms before or after treatment. Follow-up visits and imaging scans help make sure unicentric Castleman disease does not come back and to check recovery over time.
Can you cure Unicentric castleman disease?
Yes, unicentric Castleman disease can often be cured, usually by surgery to remove the one affected lymph node or group of lymph nodes. If surgery is not possible, treatments such as radiation or medicines may help control the disease and ease symptoms, but the chance of a full cure depends on whether the affected tissue can be completely treated.
Non-drug treatment
For many people living with unicentric Castleman disease, treatment is centered on removing or controlling one enlarged lymph node area rather than taking long-term medicine. Surgery is the main non-drug treatment and can often be curative when the affected tissue can be safely removed. If surgery is not possible, radiation may help shrink the mass and ease pressure on nearby organs or blood vessels. Not every approach works the same way, so care is tailored to where the growth sits and whether it is causing symptoms.
Surgery is the standard treatment for unicentric Castleman disease when the affected lymph node or mass can be removed safely. In many cases, complete removal treats the condition and symptoms improve once pressure or inflammation settles.
Radiation can be used when surgery would be too risky or the mass cannot be fully removed. It may shrink the growth over time, which can help with pain, fullness, cough, or other local symptoms.
Some people with unicentric Castleman disease need close follow-up after treatment, especially if symptoms were subtle or the mass was found by chance on a scan. Monitoring may include physical exams, blood tests, and imaging to check for return of disease or changes in recovery.
When the mass is near major blood vessels, airways, or other delicate structures, treatment planning often involves a team such as surgeons, radiologists, and anesthesia specialists. This helps make treatment safer and can lower the chance of bleeding or injury during removal.
Your genes may have an impact on how drugs work for you
For most people with unicentric Castleman disease, genes do not play a big day-to-day role in choosing treatment because the usual treatment is surgery to remove the single enlarged lymph node, and that often takes care of the problem. If medicine is needed in special situations, people can still respond differently and side effects can vary, but routine genetic testing to predict which drug will work best is not a standard part of care for this condition. In other words, unlike some cancers where gene testing helps match treatment, unicentric Castleman disease is usually managed based more on where the growth is, whether it can be removed safely, and how someone is feeling.
Pharmacological treatments
For many living with unicentric Castleman disease, the main treatment is surgery, so medicines are usually considered when the enlarged lymph node cannot be removed safely, symptoms continue, or inflammation is affecting daily life. Drug treatment for unicentric Castleman disease is not one-size-fits-all, and the choice depends on whether the disease is causing whole-body symptoms such as fever, weight loss, or abnormal blood tests. If one option isn’t effective, second-line or alternative drugs may be offered.
Rituximab is a targeted antibody drug that lowers certain overactive immune cells and is one of the better-known medicines used when unicentric Castleman disease is not easily removed with surgery. It may be used alone or with other medicines, especially when inflammation is a major part of the illness.
Siltuximab and tocilizumab are drugs that calm an inflammatory signal called interleukin-6, which can drive fever, fatigue, and abnormal lab results. These medicines are used more often in multicentric disease, but some people with symptomatic unicentric Castleman disease may receive them when inflammation remains a problem.
Corticosteroids such as prednisone or dexamethasone can quickly reduce inflammation and may help with pain, fever, or swelling. Some medicines work quickly, while others take longer, so steroids are often used as a short-term bridge rather than a long-term solution.
Chemotherapy drugs such as cyclophosphamide, vincristine, doxorubicin, and prednisone may be used in selected cases, usually when disease is difficult to control or doctors need a stronger whole-body treatment. These are not first-choice medicines for most people with unicentric Castleman disease, but they can be considered when other options are not enough.
Genetic influences
For most people living with unicentric Castleman disease, there is no sign that the condition is inherited from a parent. It’s natural to ask whether family history plays a role, especially when you are wondering whether unicentric Castleman disease is hereditary. So far, doctors have not identified a clear inherited gene change that causes unicentric Castleman disease, and most cases appear to happen sporadically, meaning they develop in one person without affecting relatives. Research suggests that in some people, acquired genetic changes in cells within the affected lymph node may help drive the growth, but these changes are usually limited to that tissue and are not passed on to children. Because of this, routine inherited genetic testing is not usually part of care for unicentric Castleman disease unless there are other unusual findings or a separate family pattern that needs a closer look.
Is Unicentric castleman disease genetic?
For unicentric Castleman disease, genetics usually are not the main cause. Most cases are not inherited, and no single gene change explains most people’s disease, though rare genetic differences may affect how lymph node cells grow.
Having a genetic risk is not necessarily a diagnosis
Genetic variants are a usual part of human biology and are widely found in the general population. Most of these variants do not have a direct effect on health and are simply part of normal human diversity. For many genes, having a variant linked to a condition points to a possible association rather than a definite diagnosis, especially when several genes and environmental factors are involved. In some situations, though, a single well-characterized variant in a particular gene can be enough to confirm a diagnosis.
Pharmacogenetics—how genetics influence drug effects
For many living with Unicentric Castleman disease, the key treatment question is often whether the enlarged lymph node can be removed safely, because surgery usually works very well and is often curative. Unlike some cancers, doctors do not usually choose treatment for Unicentric Castleman disease based on an inherited gene result or a routine pharmacogenetic test. If surgery is not possible, specialists may consider radiation or medicines such as steroids or other immune-targeting treatments to control symptoms and inflammation, but there is no widely used gene test that can reliably tell which option will work best.
Not every difference in response is genetic, but in Unicentric Castleman disease, the node’s location, nearby organs, and how much the illness is affecting the rest of the body often matter more than genes when treatment is planned. In some unusual or hard-to-classify cases, doctors may examine the lymph node tissue closely to rule out similar conditions and help guide care. So if you are wondering how genetics affect treatment for unicentric Castleman disease, the honest answer is that genetics currently plays a limited role, while imaging, pathology, and surgical planning usually guide treatment most.
Interactions with other conditions
For many living with unicentric Castleman disease, the main issue is usually one enlarged lymph node or one small cluster of nodes, but it can overlap with other illnesses that also cause swollen glands, fever, weight loss, or tiredness. Because of that, doctors often need to rule out infections, autoimmune diseases, and cancers of the lymph system such as lymphoma before confirming unicentric Castleman disease. Another important aspect is how it may link with other diseases. In a small number of people, unicentric Castleman disease occurs alongside a severe blistering skin condition called paraneoplastic pemphigus, and this can also affect the mouth and lungs, sometimes leading to serious breathing problems. Some may find that the early symptoms of unicentric Castleman disease look so much like another condition that diagnosis takes time, especially if the enlarged node is found during a scan done for something else. After treatment, most often surgery, unicentric Castleman disease usually does not behave like a whole-body inflammatory illness, but follow-up still matters to make sure symptoms are not coming from a different disease or a rare related complication.
How genes can cause diseases
Humans have more than 20,000 genes, each carrying out one or a few specific functions in the body. One gene instructs the body to digest lactose from milk, another tells the body how to build strong bones and another prevents the body's cells from beginning to multiply uncontrollably and developing into cancer. As all of these genes combined are the building instructions for our body, a defect in one of these genes can have severe health consequences.
Through decades of genetic research, we know the genetic code of any healthy/functional human gene. We have also identified that in certain positions on a gene, some individuals may have a different genetic letter from the one you have. We call these hotspots "Genetic Variations" or "Variants" in short. In many cases, studies have been able to show that having the genetic letter "G" in the position makes you healthy, but having the letter "A" in the same position disrupts the gene function and causes a disease. Genopedia allows you to view these variants in genes and summarizes all that we know from scientific research, which genetic letters (Genotype) have good or bad consequences on your health or on your traits.
What other conditions can cause similar symptoms to Unicentric castleman disease?
A single enlarged lymph node or lump caused by unicentric Castleman disease can look a lot like lymphoma, which is a cancer of the lymph system, or like infections that make lymph nodes swell, such as tuberculosis or mono. Doctors may also think about immune system illnesses like lupus, or other growths near the same area, especially in the chest or belly, because these can also cause pressure, pain, cough, or a feeling of fullness. Since these problems can overlap so much, imaging scans and often a biopsy, which means checking a small piece of tissue, are usually needed to tell them apart.
History
People living with unicentric Castleman disease often spend a long time not knowing why a swollen lymph node has shown up on a scan or during an exam. Sometimes it is found by chance before it causes any day-to-day problems at all, while in other cases pressure from the enlarged node can lead to cough, chest discomfort, or a feeling of fullness depending on where it sits in the body.
Unicentric Castleman disease entered modern medicine in the 1950s, when doctors began reporting people with a single enlarged lymph node or one involved group of nearby nodes that looked unusual under the microscope. First described in the medical literature as a localized overgrowth of lymph node tissue, it was linked to the work of Dr. Benjamin Castleman, whose name later became attached to the condition. Early reports often involved lymph nodes in the chest, but over time doctors recognized that the same pattern could appear in the neck, abdomen, pelvis, and other areas.
As medical science evolved, it became clearer that Castleman disease was not just one single illness. Doctors learned to separate unicentric Castleman disease, which affects one area, from multicentric Castleman disease, which involves multiple lymph node regions and usually causes more widespread illness. That distinction mattered because people with unicentric Castleman disease often do well when the affected lymph node is removed, while the multicentric form usually needs a different approach.
Advances in imaging, pathology, and surgery helped improve diagnosis over the following decades. Not every early description was complete, yet together they built the foundation of today’s knowledge. Researchers also came to understand that some people with unicentric Castleman disease have few or no symptoms, which explains why early symptoms of unicentric Castleman disease can be subtle and easy to miss. Today, the history of unicentric Castleman disease reflects a gradual shift from a puzzling finding in a single lymph node to a recognized condition with clearer diagnosis and more effective treatment.