Skull base chordoma is a rare, slow-growing cancer that starts near the base of the skull. It can affect children or adults, but it is most often found in adults, and the early symptoms of skull base chordoma may include headaches, double vision, facial numbness, or trouble swallowing. Many people only realize later that their symptoms were connected to skull base chordoma. Skull base chordoma often develops over months or years, and treatment usually involves surgery and radiation to control the tumor. The outlook for skull base chordoma varies because it can come back after treatment, and serious cases can be life-threatening if the tumor presses on important nerves or the brainstem.
How many people live with Skull base chordoma?
Skull base chordoma is a type of chordoma, and there is no widely used direct count for this specific type, so estimates start with chordoma overall: Orphanet suggests chordoma affects about 8,000 to 73,000 people worldwide (Orphanet, 2024) and about 330 to 3,000 people in the United States (Orphanet, 2024), with the wide range reflecting how very rare it is and differences between data sources. Since about 30% to 40% of chordomas start at the base of the skull, this suggests roughly 2,400 to 29,000 people worldwide and about 100 to 1,200 people in the U.S. may be living with skull base chordoma, but these are estimated ranges rather than direct counts.
Overview
Skull base chordomaSymptoms
Skull base chordoma often causes headaches, double vision, facial numbness, hearing changes, or trouble swallowing as it presses on nearby nerves and structures. Early symptoms of skull base chordoma can be subtle and vary by the tumor’s exact location.
Outlook and prognosis
Skull base chordoma often grows slowly, but it can return after treatment and may affect vision, swallowing, or nearby nerves. Outlook depends on tumor size, location, and how fully it can be treated, so long-term follow-up is usually part of life.
Causes and risk factors
Skull base chordoma usually starts from leftover notochord cells present before birth. Most cases happen sporadically, but rare inherited changes, including in the TBXT gene, can raise risk. No clear lifestyle or environmental risk factors are known.
Genetic influences
Genetics matter in skull base chordoma, but most cases are not inherited and happen by chance. Some tumors have changes in genes that help notochord cells grow, and rare families can have an inherited tendency to skull base chordoma.
Diagnosis
Skull base chordoma is usually diagnosed with imaging, often MRI and CT, followed by a biopsy to confirm the tumor type. Doctors may also review symptoms, exam findings, and how nearby nerves or structures are affected.
Treatment and drugs
Skull base chordoma is usually treated with surgery to remove as much tumor as safely possible, often followed by focused radiation such as proton therapy. If some remains or returns, treatment and sometimes targeted drugs or clinical trials may help.
Symptoms
Skull base chordoma often affects daily life by pressing on nerves and nearby parts of the brain, so the first signs may look like eye, face, or swallowing problems rather than whole-body illness. The changes are often subtle at first, blending into daily life until they become more noticeable. Many people with skull base chordoma first notice headaches, double vision, or numbness in the face. Symptoms depend on the exact size and location of the tumor.
Headaches are common and may feel deep, steady, and hard to explain. Because early symptoms of skull base chordoma can resemble migraine or sinus pressure, this can be overlooked for a while.
Double vision is a common symptom because nerves that move the eyes pass through this area. Some people also notice blurred vision, trouble looking to one side, or needing to turn the whole head to focus.
Numbness, tingling, or aching in the face can happen when the tumor presses on nerves that carry feeling. Some may find chewing, brushing teeth, or feeling hot and cold on one side of the face seems different.
Changes in hearing, ringing in the ears, dizziness, or unsteadiness can occur if nearby nerves or inner ear pathways are affected. In daily routines, this might show up as needing the TV louder or feeling off balance in a crowded store.
How people usually first notice Skull base chordoma?
Skull base chordoma is often first noticed when a slow-growing tumor begins pressing on nearby nerves, and the earliest clues can be easy to dismiss at first: persistent headaches, double vision, blurry vision, facial numbness, hearing changes, or trouble swallowing. Because these tumors grow at the base of the skull, some people with skull base chordoma also develop balance problems, hoarseness, or a new weakness in the face or eyes that does not go away. The first signs of skull base chordoma usually build gradually rather than all at once, which is why symptoms that keep worsening or keep returning should be checked by a doctor.
Types of Skull base chordoma
Skull base chordoma can show up in a few well-recognized forms, and the type can affect how fast it grows and what symptoms are more likely. Symptoms don’t always look the same for everyone. In medical practice, the main types of skull base chordoma are based on how the tumor cells look under a microscope, and these differences can help explain why some tumors behave more quietly while others are more aggressive.
Conventional
This is the most common type of skull base chordoma. It often causes symptoms by pressing on nearby nerves or brain structures, so many living with it notice headaches, double vision, facial numbness, or trouble swallowing that builds up slowly. Symptoms may develop over months because these tumors usually grow gradually.
Chondroid
This variant has features of both chordoma and cartilage-like tissue, and it is often found at the skull base. The symptoms are usually similar to conventional skull base chordoma, such as headaches or vision changes, but some studies suggest it may behave a little less aggressively in some people.
Dedifferentiated
This is a rare but more aggressive form that contains an area of high-grade cancer within the chordoma. Symptoms can worsen more quickly, with faster-growing pain, nerve-related problems, or other pressure symptoms depending on the exact location. Compared with other variants of skull base chordoma, it is more likely to grow and spread rapidly.
Poorly differentiated
This uncommon type is seen more often in children and younger people than in older adults. It tends to act more aggressively, so early symptoms of skull base chordoma in this group may appear over a shorter time and can include headaches, vision problems, or trouble with eye movements. Testing of the tumor often shows a specific missing protein pattern that helps confirm this variant.
Can I slow down the onset of symptoms?
No, there is currently no good evidence that lifestyle changes or medicines can meaningfully delay the start of symptoms from a skull base chordoma. Research has not shown that exercise, diet, sleep, or supplements can prevent this tumor or push symptoms back, although these habits still support overall health. Studies are ongoing to better understand why chordomas develop, so while there is no proven way to stop them from starting, paying attention to lasting new symptoms and getting them checked promptly can still help you get care sooner.
What genetics can tell you about symptoms
For people with skull base chordoma, genetics can sometimes explain risk a little more than symptoms: rare inherited changes have been linked to a higher chance of developing chordoma, but they do not reliably predict exactly which symptoms someone will have. In day-to-day life, symptoms such as headaches, double vision, facial numbness, or trouble swallowing are usually driven more by where the tumor is growing at the base of the skull and how much pressure it puts on nearby nerves and structures. Changes found in the tumor itself may help doctors understand how the cancer behaves, but they are not yet a dependable way to tell when symptoms will start or how severe they will be in one individual.
Causes and risk factors
When people ask about the risk factors for skull base chordoma, doctors usually cannot point to one clear cause. This tumor is thought to begin in tiny leftover cells from early development at the base of the skull. Over time, new gene changes in these cells can help a tumor grow, and rare inherited changes in TBXT can raise the risk in some families. No proven lifestyle or environmental risks have been found. Researchers are still learning how these pieces fit together, and skull base chordoma appears a little more common in males and in middle age or later.
What are the most common causes or risk factors?
Skull base chordoma usually is not caused by anything you did. It most often begins when a small group of cells left over from before birth, near the base of the skull, starts growing out of control, and in a small number of families, inherited gene changes can raise the risk. There are no strong links to smoking, diet, or everyday exposures, but chordoma is seen more often in adults and slightly more often in males.
Environmental and biological risk factors
Skull base chordoma is a rare tumor, and for most people there is no single clear reason it develops. When people look into risk factors for skull base chordoma, the main patterns doctors see are biological rather than environmental. Doctors often group risks into internal (biological) and external (environmental), but for this tumor, proven external triggers are very limited.
Skull base chordoma is diagnosed most often in adults, especially in middle age and later adulthood. It can happen in younger people, but that is less common.
Skull base chordoma is seen somewhat more often in males than in females. This pattern is modest, so the tumor can still occur in either sex.
Skull base chordoma grows from leftover cells of the notochord, a temporary structure that helps form the early spine before birth. When these cells remain near the base of the skull, they create the biological starting point for this tumor.
No specific environmental exposure has been clearly proven to cause most cases of skull base chordoma. There is no strong evidence linking it to a common toxin, infection, or routine day-to-day exposure.
Genetic risk factors
Most skull base chordoma cases are not inherited and do not happen because of a gene change you were born with. A small number are linked to inherited genetic changes, most clearly in the TBXT gene, which is involved in early development of the tissues chordoma comes from. Carrying a genetic change doesn’t guarantee the condition will appear. When skull base chordoma shows up in several relatives or at a very young age, doctors may look more closely for an inherited cause.
Sporadic tumor changes: In many people with skull base chordoma, the key DNA changes are found only in the tumor itself. That means the change was not present in the rest of the body and usually was not passed down in the family.
TBXT gene: Rare inherited extra copies of the TBXT gene are the best-established genetic cause of chordoma. They can raise the chance of developing a skull base chordoma, although they are found in only a small share of cases.
Family history: Having more than one close relative with chordoma can suggest an inherited susceptibility. This pattern is uncommon, but it is one of the clearest genetic risk factors for skull base chordoma.
SMARCB1 changes: Some poorly differentiated chordomas are linked to changes in the SMARCB1 gene. This rarer subtype is seen more often in children, and in some families the change can be inherited.
Tuberous sclerosis: Very rarely, chordoma occurs in people with tuberous sclerosis complex, an inherited condition caused by changes in TSC1 or TSC2. This association is uncommon, but it is a recognized genetic link, especially in children.
Lifestyle risk factors
When people ask about lifestyle risk factors for skull base chordoma, the key point is that no diet, exercise pattern, or other personal habit has been clearly shown to cause this rare tumor. Unlike many more common cancers, skull base chordoma is not strongly linked to established lifestyle exposures. Still, everyday habits can influence overall health, symptom burden, treatment tolerance, and recovery.
Smoking has not been proven to cause skull base chordoma. However, it can impair wound healing, reduce oxygen delivery, and increase complications after surgery or radiation.
Alcohol is not a known cause of skull base chordoma. Heavy drinking can worsen nutrition, sleep, balance, and medication tolerance during treatment and recovery.
No specific diet has been shown to trigger skull base chordoma. Poor nutrition can contribute to weight loss, weakness, and slower recovery if the tumor or its treatment affects eating, swallowing, or general stamina.
Lack of exercise is not an established cause of skull base chordoma. But low activity can lead to deconditioning, fatigue, and poorer physical function before or after major treatment.
Risk prevention
For most people, there is no proven way to prevent skull base chordoma from developing. This rare tumor usually arises from leftover cells present since before birth, and it is not strongly linked to everyday habits such as diet, exercise, or smoking. Prevention is about lowering risk, not eliminating it completely. In practice, this means focusing on early evaluation of possible early symptoms of skull base chordoma, lowering treatment complications, and staying as healthy as possible if you have a personal or family history that raises concern.
A small number of people with skull base chordoma may have an inherited risk, so it helps to know whether close relatives have had chordoma or related rare tumors. If that pattern is present, genetic counseling can help you understand risk and whether relatives should be assessed.
Skull base chordoma cannot usually be prevented, but prompt care for ongoing double vision, headaches, facial numbness, hearing changes, or trouble swallowing may lead to earlier diagnosis. Earlier treatment can sometimes reduce how far skull base chordoma grows before it is found.
If you have had skull base chordoma before, keeping all follow-up scans and specialist visits is one of the best ways to prevent complications from recurrence. Prevention works best when combined with regular check-ups.
Before and after treatment for skull base chordoma, careful wound care, hand hygiene, and keeping up with recommended vaccines can help lower the risk of infection. This matters especially if surgery, radiation, or other treatment has affected healing or immunity.
Can you prevent Skull base chordoma?
No, there is no known way to prevent skull base chordoma. This rare tumor usually develops from leftover cells near the base of the skull that have been there since before birth, and there are no well-proven lifestyle or environmental risk factors that people can change to stop it from happening. If it runs in a family in very rare cases, genetic counseling may help people understand risk, but it cannot guarantee prevention.
Transmission
Skull base chordoma is not contagious, so it cannot be passed from one person to another through touching, coughing, sex, or blood. For most people living with Skull base chordoma, it does not run in families and usually develops because of new DNA changes that happen by chance in cells over time.
When looking at how Skull base chordoma is inherited, the key point is that inherited cases are rare, although a small number of families may have a higher risk because of a gene change passed from parent to child. If several relatives have had chordoma, genetic counseling can help clarify whether there may be a family pattern.
When to test your genes
Most people with skull base chordoma do not need routine inherited genetic testing. It becomes more relevant if you have a family history of chordoma, multiple affected relatives, or features suggesting a rare inherited syndrome, because those clues can change counseling and sometimes guide care.
Diagnosis
Skull base chordoma is usually diagnosed after ongoing symptoms lead to a closer look, often because headaches, double vision, facial numbness, or trouble swallowing are not improving. Doctors usually begin with a medical history, a neurologic exam, and imaging to find the cause and see whether a mass is pressing on nearby nerves or brain structures. Because this tumor sits deep at the base of the skull, the diagnosis of skull base chordoma often depends on combining scan results with a tissue sample.
Doctors ask about symptoms, when they started, and how they affect daily life, such as trouble with vision, balance, speech, or swallowing. They also review past health issues and any earlier scans or treatments that might help explain what is causing the changes.
This exam checks how the brain and nerves are working, including eye movements, facial feeling, hearing, strength, and coordination. Changes on the exam can help show which nearby nerves or parts of the skull base may be involved.
MRI is usually the main imaging test for skull base chordoma because it shows soft tissues in great detail. It helps doctors see the size of the tumor, its exact location, and whether it is affecting the brainstem, nerves, or nearby blood vessels.
CT is often used along with MRI to look closely at the bones of the skull base. It can show bone destruction or calcification, which may help narrow down the diagnosis and plan surgery.
How is Skull base chordoma diagnosed?
Doctors usually suspect a skull base chordoma based on symptoms and imaging tests, especially an MRI and often a CT scan, which can show a mass at the base of the skull and whether it is affecting nearby bone, nerves, or the brainstem. The diagnosis is usually confirmed by removing a small piece of the tumor, called a biopsy, and checking it under a microscope. Genetic testing is not usually the main way this tumor is diagnosed, but it may sometimes be used in special situations or as part of treatment planning.
Stages of Skull base chordoma
Skull base chordoma does not have defined progression stages. This is because it is usually described by where the tumor is, how large it is, and whether it has grown into nearby structures or come back after treatment, rather than by a set step-by-step pattern over time. Doctors usually start with a conversation about symptoms, and the early symptoms of skull base chordoma can be easy to miss because they often depend on which nearby nerves or areas are being pressed. Diagnosis and follow-up usually rely on imaging tests such as MRI or CT scans, along with a biopsy to confirm the tumor type and repeated scans to monitor for growth or recurrence.
Outlook and prognosis
The outlook for skull base chordoma varies widely and depends on how much of the tumor can be safely removed, whether high-dose radiation is possible, and if the disease recurs or spreads. Even though these tumors usually grow slowly, they are locally aggressive and often come back years after treatment, so long-term follow-up is essential. In modern series using surgery plus specialized radiation such as proton or carbon ion therapy, many patients live for years, with reported 5-year overall survival often around 70% to 90%, while long-term local control remains more challenging. Prognosis is generally better for smaller tumors, younger patients, and cases without brainstem involvement or metastasis. Death can occur from progressive local disease affecting critical structures at the skull base, and less commonly from metastatic spread, so recurrence remains the main driver of mortality.
Long-term effects
Skull base chordoma can have lasting effects because it grows in a crowded area near the brain, nerves, and hormone centers, and treatment itself can also leave long-term changes. For many, this can mean ongoing issues with vision, hearing, swallowing, balance, hormone function, or headaches, even after the tumor is treated. The long-term picture is often shaped by whether the tumor can be fully removed, whether it comes back, and which nearby structures were affected.
Skull base chordoma can return months or years after surgery or radiation, so long-term follow-up is usually needed. When it comes back, it may cause some of the same problems as the early symptoms of skull base chordoma, such as headaches, double vision, or facial numbness.
Because the tumor sits close to the nerves that control sight and eye movement, some people have lasting double vision or reduced vision. These changes may stay stable, but in some cases they can worsen if the tumor grows back.
Many living with skull base chordoma may have ongoing hearing loss, ringing in the ears, dizziness, or poor balance if nearby nerves or inner ear pathways were affected. For many, symptoms are most noticeable when walking on uneven ground or turning quickly.
Treatment or tumor pressure can lead to long-term trouble swallowing, hoarseness, or speech changes. Some may also have a weak cough or a higher risk of food or liquid going down the wrong way.
How is it to live with Skull base chordoma?
Living with skull base chordoma often means coping with a rare tumor in a very crowded part of the body, where even small changes can affect vision, hearing, swallowing, balance, headaches, or facial sensation. Daily life may revolve around medical appointments, imaging scans, surgery or radiation recovery, and the uncertainty of watching for regrowth, which can make work, school, driving, and energy levels harder to manage. Family and close friends are often affected too, because they may help with transportation, communication, meals, and emotional support, while everyone adjusts to a condition that can be slow-growing yet still deeply disruptive.
Treatment and drugs
Skull base chordoma is usually treated with a mix of surgery and carefully targeted radiation, because these tumors sit near important structures like the brainstem, nerves, and major blood vessels. The main goal is to remove as much of the tumor as is safely possible, then lower the chance of it growing back, and for many this can mean care from a team that includes neurosurgeons, ear, nose, and throat surgeons, radiation doctors, and imaging specialists. Treatment plans often combine several approaches. Standard chemotherapy usually does not work well for skull base chordoma, but some people may be offered targeted drugs or a clinical trial if the tumor cannot be fully removed, comes back, or spreads. Follow-up is a big part of treatment too, since regular MRI scans help check for regrowth and guide the next steps over time.
Can you cure Skull base chordoma?
Skull base chordoma, a rare slow-growing cancer near the bottom of the skull, does not have a simple guaranteed cure, but some people can do very well for a long time if the tumor can be treated fully. Treatment usually aims to remove as much of it as possible with surgery and then use highly focused radiation to kill or control what is left. Even after treatment, it can come back, so regular checkups and scans are an important part of care.
Non-drug treatment
Treatment for skull base chordoma often centers on procedures and therapies that aim to remove or control the tumor while protecting nearby nerves, the brainstem, and blood vessels. For many, treatment begins not at the pharmacy, but with surgery and highly targeted radiation. Supportive care is also important, because day-to-day issues like double vision, swallowing trouble, headaches, or balance problems can affect recovery and quality of life. The exact plan depends on the tumor’s size, location, and whether it has come back after earlier treatment.
Surgery is often the main treatment for skull base chordoma, with the goal of removing as much of the tumor as is safely possible. Because these tumors sit in a crowded area near critical structures, surgery is usually done by specialized teams using endoscopic or open approaches.
Highly focused radiation is commonly used after surgery or when surgery cannot remove the whole tumor. Options may include proton therapy, stereotactic radiosurgery, or other focused radiation, and radiation therapy for skull base chordoma is often planned to limit damage to nearby healthy tissue.
Physical therapy, occupational therapy, and speech or swallowing therapy can help with weakness, balance problems, fatigue, or trouble eating and speaking after treatment. Non-drug options can be a practical part of recovery, especially when symptoms affect daily routines like walking safely or getting through meals.
If the tumor or its treatment affects eyesight, hearing, facial movement, or swallowing, targeted support from eye, ear, and swallowing specialists may help. This can include prism lenses, hearing support, swallowing exercises, or strategies to make eating and communication safer and easier.
Your genes may have an impact on how drugs work for you
For people living with skull base chordoma, treatment is usually centered on surgery and radiation, so medicines often play more of a supporting role, such as helping with pain, nausea, or swelling. In some cases, small inherited differences in your genes can affect how your body breaks down certain medicines, which may change how well they work or how likely they are to cause side effects; for example, one person may get good relief from a standard dose while another feels very little benefit or becomes overly sleepy. At the same time, changes inside the tumor itself may sometimes help doctors choose a targeted drug when the tumor comes back or cannot be fully treated, but this kind of gene-guided drug selection is not yet routine for most skull base chordomas.
Pharmacological treatments
Drug treatment for skull base chordoma is usually not the first treatment, because surgery and radiation are the main approaches when possible. Medicines are most often considered when the tumor cannot be fully removed, comes back, or has spread. Drug treatments aren’t about fixing everything at once, but they may help slow tumor growth or control symptoms in some people.
Imatinib is one of the best-known targeted drugs used for advanced or recurrent chordoma, especially when tests suggest the tumor is using the PDGFR pathway. It may help slow growth for some people with skull base chordoma, although it does not work for everyone.
Erlotinib, gefitinib, lapatinib, and afatinib are targeted drugs that may be used when the tumor shows activity in the EGFR pathway. These medicines are usually considered in recurrent or hard-to-treat disease rather than as first treatment.
Sorafenib, sunitinib, and pazopanib are drugs that block blood vessel growth signals that tumors use to keep growing. In some people with advanced chordoma, they may help hold the disease steady for a time.
Everolimus and similar medicines have sometimes been used, often together with other targeted treatment rather than alone. The benefit can vary, and this approach is usually guided by a specialist team familiar with chordoma.
Genetic influences
Most people with skull base chordoma do not inherit it from a parent. In many cases, the tumor seems to develop after DNA changes build up over time in leftover cells from early development, rather than from a gene change present in every cell of the body. Rarely, skull base chordoma can run in families because of an inherited change involving the TBXT gene, also called brachyury. Family history is one of the strongest clues to a genetic influence. A few uncommon chordomas, especially in children, are linked to other genes such as SMARCB1. If several relatives have had chordoma, or if the diagnosis happens at a young age, doctors may suggest genetic counseling or testing to better understand the genetic risk of skull base chordoma.
Is Skull base chordoma genetic?
Genetics matter in skull base chordoma, but most cases are not inherited and happen by chance. Some tumors have changes in genes that help notochord cells grow, and rare families can have an inherited tendency to skull base chordoma.
Having a genetic risk is not necessarily a diagnosis
Changes in genes are a usual part of human biology and are widely seen across the general population. Most of these variants do not directly affect health and simply reflect normal human diversity. In many genes, having a variant connected with a condition points to a possible link, not a certain diagnosis, especially when several genes and environmental factors play a role. In some situations, though, one well-characterized variant in a particular gene is enough to confirm a diagnosis.
Pharmacogenetics—how genetics influence drug effects
For many living with skull base chordoma, treatment decisions are still driven mainly by where the tumor sits and whether surgery and focused radiation are possible. Inherited genes do not yet routinely determine which drug you receive for skull base chordoma the way they do for some other cancers. Instead, doctors may study the tumor’s own genetic changes from a biopsy, because these can sometimes point toward a clinical trial or a targeted medicine when standard options are limited. Genetics is only one factor, though, and these results do not replace careful imaging, surgery planning, and radiation decisions. Most skull base chordomas carry a marker linked to a gene called TBXT, also known as brachyury, which helps confirm the diagnosis but does not yet reliably show which drug will work best. In practice, genetic testing for skull base chordoma is most helpful when the tumor returns or cannot be fully removed, since it may help specialist teams look for research studies and newer treatment options.
Interactions with other conditions
Skull base chordoma can press on areas that control vision, eye movement, swallowing, hearing, and hormone balance, so its symptoms may overlap with migraine, sinus problems, inner ear disorders, or pituitary conditions. This can make the early symptoms of skull base chordoma easy to mistake for a more common health issue, especially if someone is already living with one of those conditions. Doctors call it a comorbidity when two conditions occur together. Treatment can also interact with other illnesses, since people with diabetes, hormone problems, or poor wound healing may need closer planning around surgery or radiation. Because skull base chordoma grows near the brainstem and several important nerves, existing balance, swallowing, or vision problems can sometimes feel more noticeable during treatment. Individual treatment plans can help coordinate care between neurosurgery, radiation specialists, endocrinology, and eye or ear doctors.
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 Skull base chordoma?
Symptoms that can look like a skull base chordoma can also be caused by other growths near the bottom of the skull, especially meningioma, pituitary tumors, tumors growing from nearby nerves, and another rare bone tumor called chondrosarcoma. Cancers in the back of the nose or upper throat can also cause similar problems, such as headaches, double vision, facial numbness, or trouble swallowing. Because these symptoms overlap so much, doctors usually need scans and sometimes a tissue sample to tell the difference.
History
For many people living with skull base chordoma, the story often starts with everyday problems that do not seem connected at first, such as double vision, headaches, facial numbness, or trouble swallowing. A slow-growing tumor deep at the base of the skull can cause these symptoms gradually, so early cases were easy to mistake for other neurologic or ear, nose, and throat conditions.
In the 1800s, doctors began describing unusual jelly-like growths along the spine and skull base. First described in the medical literature as a distinctive tumor in the mid-19th century, chordoma became better understood when later researchers linked it to remnants of the notochord, a structure present very early in human development before the spine fully forms. That insight mattered because it showed these tumors were not just odd bone growths, but a separate disease with a specific origin.
As medical science evolved, doctors learned that skull base chordoma tends to grow slowly but can still be serious because of where it sits, close to the brain, cranial nerves, and major blood vessels. Better imaging in the late 20th century, especially CT and MRI scans, made it much easier to see the tumor clearly before surgery. This helped explain why the early symptoms of skull base chordoma can be so varied: even a small change in that crowded area may affect vision, balance, speech, or facial feeling.
Treatment has also changed over time. Earlier surgery was limited by how hard this part of the skull is to reach safely. Over the years, skull base surgery became more precise, and radiation methods improved, including highly focused approaches that aim to protect nearby healthy tissue. Researchers later identified a genetic basis for chordoma in general, which helped confirm that it is a distinct tumor type, although diagnosis and care still rely mainly on the tumor’s location, imaging, and pathology findings.
Today, skull base chordoma is still considered rare, but awareness is much better than it once was. That means many living with skull base chordoma can now be diagnosed more accurately and treated by teams with experience in complex skull base tumors, something that was far less common in the past.