Limb body wall complex is a rare, severe birth condition that affects the developing baby before birth. It usually includes major features such as a large opening in the chest or abdomen, organs developing outside the body, and serious changes in the limbs and spine. Many people first hear about Limb body wall complex during a prenatal ultrasound, and the condition is usually recognized before birth. Limb body wall complex is present from early pregnancy, and in most cases it is life-limiting and leads to death before birth or shortly after delivery. There is no cure for Limb body wall complex, so care focuses on confirming the diagnosis, supporting the family, and planning pregnancy and newborn care based on the findings.
How many people live with Limb body wall complex?
There are no reliable worldwide or U.S. estimates for how many people are living with limb-body wall complex. Rare-disease references describe it as extremely rare and usually not allowing long-term survival, so published figures are generally about affected pregnancies or births rather than about people living with the condition (NIH Genetic and Rare Diseases Information Center, 2024; Orphanet, 2024).
Overview
Limb body wall complexSymptoms
Limb body wall complex causes severe birth defects, often involving the chest or belly wall, limbs, spine, and organs. It is usually recognized on prenatal ultrasound or at birth.
Outlook and prognosis
Limb body wall complex is usually life-limiting because it causes severe problems with body wall formation and organ development before birth. Most affected pregnancies end in miscarriage, stillbirth, or death shortly after delivery, and long-term survival is exceptionally rare.
Causes and risk factors
Limb body wall complex usually happens very early in pregnancy from a major developmental problem, often without a clear cause. It is usually sporadic rather than inherited, and no lifestyle or environmental risk factor has been proven to directly cause limb body wall complex.
Genetic influences
Genetics do not seem to play a major role in Limb body wall complex for most families. Most cases are thought to happen sporadically, with no clear inherited pattern and no single genetic change consistently linked to Limb body wall complex.
Diagnosis
Limb body wall complex is usually diagnosed from clear findings on prenatal ultrasound, often early in pregnancy. After birth, diagnosis is based on physical features and imaging; genetic tests may help rule out other conditions.
Treatment and drugs
Treatment for limb body wall complex centers on careful pregnancy monitoring, counseling, and delivery planning. After birth, care usually focuses on comfort, breathing support, and feeding help. Specialists also guide families through decisions and emotional support.
Symptoms
Limb body wall complex is usually first noticed during pregnancy, often when an ultrasound shows that part of the chest or belly has not closed and some organs are outside the body. The early features of limb body wall complex are present before birth and can look different from one baby to another, but the overall pattern is usually severe. Doctors may also see changes in the limbs, spine, or umbilical cord on the same scan.
A large gap in the chest, abdomen, or both is one of the main signs. On ultrasound, the liver, bowel, or other organs may be seen outside the body because the wall did not fully close.
In babies with limb body wall complex, one or more arms or legs may be shorter than usual, missing parts, or fixed in an unusual position. Hands or feet can also form differently, which may be clear on prenatal imaging.
The umbilical cord is often very short, and in some cases it may be hard to see clearly. This can make the baby appear very close to the placenta on the scan.
Many babies with limb body wall complex have marked curvature or twisting of the spine and trunk. This can affect overall body shape and is often seen along with an unusual position in the womb.
How people usually first notice Limb body wall complex?
Limb body wall complex is usually first noticed during pregnancy, often on a prenatal ultrasound, when doctors see major changes in how the baby’s body wall, spine, or limbs are forming. The first signs of Limb body wall complex may include organs developing outside the body, a very short or absent umbilical cord, and severe differences in the chest, abdomen, or limbs. In some cases, it is confirmed at birth, but for many families, how Limb body wall complex is first noticed is through early imaging that shows these striking structural differences.
Types of Limb body wall complex
No distinct types of Limb body wall complex are widely recognized.
Can I slow down the onset of symptoms?
No. Limb-body wall complex begins very early in pregnancy and is already present before birth, so there is no evidence that lifestyle changes or medical treatment can meaningfully slow its onset once it starts. Researchers are still trying to understand why it happens, and although general healthy pregnancy habits are important for overall health, they have not been shown to reduce the risk of or prevent this specific condition; early prenatal care and ultrasound can help find it sooner so families can get support and plan next steps.
What genetics can tell you about symptoms
For limb body wall complex, genetics usually cannot tell doctors much about which symptoms will happen, how severe they will be, or exactly why one pregnancy is affected and another is not. This condition is generally not linked to one clear inherited gene change, and most cases appear to happen sporadically, so genetic testing often does not predict the pattern of body wall, limb, or organ differences. The condition begins very early in fetal development, and the features are usually present before birth, but the exact combination and severity can vary a lot from case to case.
Causes and risk factors
In Limb body wall complex, the exact cause is usually unclear, but it seems to start very early in pregnancy when the body wall and limbs do not form in the usual way. Possible biological causes include abnormal folding of the early embryo, reduced blood flow, or problems with the membranes around the baby. Researchers are still learning how these pieces fit together. Most cases happen by chance, and doctors have not found a consistent inherited gene change or family pattern. No specific lifestyle habit or environmental exposure has been proven to cause Limb body wall complex, so this is not usually linked to anything a parent did or did not do.
What are the most common causes or risk factors?
The exact cause of limb body wall complex is still not clear, and most cases seem to happen by chance very early in pregnancy, when the baby’s body wall, organs, and limbs are forming. It is usually not inherited, so family history and a parent passing down a gene change are not considered common risk factors, although rare chromosome problems have been reported in some pregnancies. No non-genetic risk factor has been clearly proven as a major cause, so for most families there is nothing they did or did not do that caused it.
Environmental and biological risk factors
For limb body wall complex, doctors have not identified one clear environmental or biological risk factor that explains most cases. Researchers are still exploring how outside influences interact with our inner biology. The main explanations involve very early developmental changes in the pregnancy, and most cases seem to happen sporadically.
No medication, infection, or environmental exposure has been consistently proven to cause limb body wall complex in most cases. This means a specific outside trigger usually cannot be identified after an affected pregnancy.
One leading biological theory is that very early rupture or abnormal development of the amniotic sac may disrupt normal fetal development. This is a proposed cause in some cases, but it is not a confirmed risk factor that can be predicted ahead of time.
Another accepted theory is that reduced or disrupted blood flow very early in pregnancy may interfere with how the fetus develops. This may help explain some cases of limb body wall complex, although it is not a routine screening risk factor.
Abnormal folding of the embryo in the first weeks of development is also thought to play a role. When this early shaping process is disrupted, the body wall and limbs may not form in the usual way.
Genetic risk factors
For families, one of the hardest parts about limb body wall complex is that the exact cause is still not clear. In most reported cases, limb body wall complex seems to happen sporadically, which means it usually is not passed down through families. No single gene has been confirmed as the usual cause, and chromosome testing is often normal. Carrying a genetic change doesn’t guarantee the condition will appear, but genetics review can sometimes help estimate the chance of it happening again.
Sporadic occurrence: Most cases of limb body wall complex happen in families with no previous history of the condition. This pattern suggests it is usually a one-time event rather than a clearly inherited disorder.
Family history: A strong family pattern has not been shown for limb body wall complex. When a close relative had a similar severe birth difference, genetics specialists may look closely to see whether it was truly the same condition or a different disorder that can run in families.
Single-gene cause: Researchers have not found one specific gene that explains most cases of limb body wall complex. This is why genetic testing does not always give a clear answer for affected families.
Chromosome changes: Many affected pregnancies have normal chromosome results. Rare chromosome differences have been reported, but they do not explain most cases and have not pointed to one consistent genetic cause.
Recurrence risk: For most families, the chance of limb body wall complex happening again appears to be low. If there has been more than one affected pregnancy or other unusual findings, broader testing may help clarify the genetic causes of limb body wall complex in that family.
Lifestyle risk factors
Limb body wall complex is present before birth, so lifestyle habits do not cause it. In the rare situations where a child survives, how lifestyle affects limb body wall complex is mainly through day-to-day support that influences comfort, infection risk, breathing, growth, and mobility. Because needs vary widely, plans are usually individualized with surgical, rehabilitation, nutrition, and nursing teams.
Good nutrition can be crucial for growth, wound healing, and recovery after procedures in children with limb body wall complex. Feeding problems, reflux, or higher energy needs can worsen weakness and delay healing if intake is poor.
Gentle, adapted movement and positioning may help preserve joint range, reduce stiffness, and support circulation in children with major limb or body wall differences. Too little movement can increase contractures, pressure injury risk, and loss of function.
Careful daily skin and dressing routines can lower the chance of breakdown or infection around exposed tissues, surgical sites, or abdominal wall defects. Poor skin care can quickly lead to pain, contamination, and complications that require urgent treatment.
Positioning, airway clearance routines, and adherence to breathing support can improve ventilation in children whose chest or abdominal differences make breathing less efficient. Missed respiratory care can raise the risk of mucus retention, infections, and hospital admission.
Risk prevention
Limb body wall complex is a rare condition that develops very early in pregnancy, and in most cases there is no known action that fully prevents it. Prevention is about lowering risk, not eliminating it completely. Because the exact cause is still unclear and many cases seem to happen sporadically, the best approach is to support overall health before and during pregnancy and avoid exposures that can harm early fetal development. For families who have questions about limb body wall complex, pre-pregnancy counseling can help put possible risks into context.
Seeing a clinician before conception can help review medicines, medical conditions, and any past pregnancy complications. This can lower avoidable risks during the first weeks of pregnancy, when limb body wall complex begins to develop.
Taking folic acid before pregnancy and in early pregnancy supports normal early development. It may not specifically prevent limb body wall complex, but it is a standard step to reduce some major birth defects.
Avoiding alcohol, smoking, recreational drugs, and unnecessary exposure to toxins is an important part of early pregnancy care. Some possible risk factors for limb body wall complex overlap with exposures that can also increase the chance of other serious fetal problems.
Some medicines are not safe in pregnancy, especially during the earliest weeks before someone knows they are pregnant. Reviewing prescriptions, over-the-counter drugs, and supplements with a doctor can help reduce preventable risks.
Can you prevent Limb body wall complex?
No, there is no known way to prevent limb body wall complex, and in most cases it seems to happen by chance rather than because of something a parent did or did not do. Good prenatal care and avoiding alcohol, smoking, and harmful drugs are still important for a healthy pregnancy overall, but they have not been shown to specifically prevent this condition. If you have had a pregnancy affected by it, meeting with a genetics specialist can help you understand what is known about future pregnancy risk.
Transmission
Limb body wall complex is not infectious, so it cannot be caught from another person or spread through touch, الهواء, food, or sex. For many families, the main question is how Limb body wall complex is inherited, and in most cases it is not thought to be passed down from parent to child in the usual genetic way.
Instead, Limb body wall complex usually appears as a rare, one-time problem very early in pregnancy while the baby’s body is forming. Current evidence suggests the genetic transmission of Limb body wall complex is uncommon, and most affected pregnancies happen without a family history or anything a parent did or did not do.
When to test your genes
For limb-body wall complex, routine gene testing is not usually recommended because most cases appear sporadic and no single causative gene is established. Testing may be considered during an affected pregnancy, or after a previous affected pregnancy, mainly to rule out chromosome conditions or other syndromes and to guide genetic counseling.
Diagnosis
Limb body wall complex is usually diagnosed before birth, often when imaging shows a pattern of major body wall and limb differences rather than a single isolated finding. For some, routine check-ups reveal the first clues. The diagnosis of limb body wall complex is mainly based on prenatal ultrasound findings, with other tests sometimes used to confirm what is seen and to rule out similar conditions.
Ultrasound is the main test used to diagnose limb body wall complex during pregnancy. Doctors look for a large opening in the chest or belly wall, organs outside the body, severe spinal curvature, and limb differences. The pattern and severity of findings are often what make the diagnosis clear.
A follow-up ultrasound may take a closer look at the placenta, umbilical cord, and the baby's position. These imaging findings can help show the short or absent cord and the close attachment of the baby to the placenta that are often seen in limb body wall complex.
The diagnosis is supported when scans show major defects of the abdomen, chest, or both. Seeing these changes together, rather than alone, helps doctors distinguish limb body wall complex from conditions such as an isolated abdominal wall defect.
Doctors also assess the arms and legs for missing, shortened, or unusually positioned limbs. These clinical features are an important part of the overall picture and help confirm that the differences are part of a broader congenital pattern.
How is Limb body wall complex diagnosed?
Limb body wall complex is usually diagnosed with an ultrasound in early or mid-pregnancy, when doctors can see a large opening in the chest or belly wall, organs developing outside the body, and major changes in the limbs and spine. They may also notice that the umbilical cord is very short or hard to see, and if the condition was not found before birth, the diagnosis is usually clear from a careful physical exam after delivery. Genetic testing may sometimes be offered to help rule out other conditions, but this condition is mainly diagnosed from the baby's physical features seen on scans and exam.
Stages of Limb body wall complex
Limb body wall complex does not have defined progression stages. This is because it is a severe pattern of birth differences that develops very early in pregnancy rather than a condition that gradually worsens over time after diagnosis. It is usually recognized on prenatal ultrasound, often when doctors see major changes in the abdominal wall, chest wall, spine, or limbs, and the early signs of limb body wall complex are typically structural findings on imaging rather than symptoms that unfold in stages. Different tests may be suggested to help confirm what is seen on the scan and to look for related findings, including follow-up ultrasound and sometimes fetal MRI or genetic testing.
Outlook and prognosis
The outlook for babies with limb body wall complex is extremely poor, because the condition is usually associated with severe malformations of the abdominal or thoracic wall, spine, limbs, and internal organs. Most affected pregnancies end in miscarriage, stillbirth, or death shortly before or after delivery. In the rare liveborn infant, survival is generally measured in minutes to hours, and prolonged survival is exceptional. Mortality is therefore very high, approaching 100% in most reported series. For families, counseling usually focuses on the lethal nature of the condition, options for pregnancy management, and support for grief and future reproductive planning.
Long-term effects
Limb body wall complex usually has a very serious outlook, and many affected pregnancies end in miscarriage, stillbirth, or death shortly after birth. The long-term picture is often very different from one pregnancy to another because the changes in the body can range from severe to extreme. In the rare situation where a baby survives, long-term effects of limb body wall complex usually involve major physical differences and ongoing medical needs.
For most babies, limb body wall complex is life-limiting because the chest, belly, spine, or other organs may not develop in a way that can support life. What affects survival with limb body wall complex is mainly how severe these body changes are and which organs are involved.
Babies who survive usually have large openings in the chest or abdomen that can leave organs outside the body. These changes often require complex surgery and can lead to repeated hospital care over time.
Many living with limb body wall complex have major differences in the arms or legs, such as shortened, missing, or fixed limbs. Over time, daily routines may need substantial support because movement, sitting, standing, or hand use can be very limited.
If the chest, diaphragm, or abdomen is affected, breathing can remain difficult after birth and may require intensive support. Feeding problems, poor weight gain, and slow growth can also become long-term concerns in rare survivors.
How is it to live with Limb body wall complex?
Living with limb-body wall complex is very different from most long-term medical conditions because it is usually a severe condition present before birth, and many affected babies do not survive pregnancy or live only a short time after delivery. For families, the daily reality is often less about ongoing symptom management and more about high-risk pregnancy care, difficult decisions, intensive medical support at birth, and profound emotional strain, grief, and uncertainty. The effects reach well beyond the baby, often shaping the lives of parents, siblings, and loved ones through repeated medical appointments, hospital time, and the need for clear information, compassionate counseling, and strong practical and emotional support.
Treatment and drugs
Limb body wall complex is a very severe birth condition, and there is no medicine or standard treatment that can correct the underlying problem. Care usually focuses on careful diagnosis during pregnancy, clear counseling about what to expect, and planning for delivery in a center with maternal-fetal and newborn specialists. Supportive care can make a real difference in how you feel day to day, especially by helping families understand options, prepare for decisions, and get emotional support. If a baby is born alive, treatment is usually supportive rather than curative and may include help with breathing, feeding, comfort, and pain relief, while surgery is often not possible because the changes involve several major parts of the body. Because the condition can vary, the best plan is individualized and may include neonatology, surgery, genetics, and palliative care teams.
Can you cure Limb body wall complex?
No, limb-body wall complex cannot be cured. It causes very serious problems in how a baby’s body develops before birth, and current treatment cannot reverse those changes. Care usually focuses on clear guidance during pregnancy and, if a baby is born alive, comfort care and support for the baby and family.
Non-drug treatment
Limb body wall complex is a very severe birth condition, so care usually centers on support, careful planning, and helping families make informed choices rather than curing the condition itself. For many, treatment begins not at the pharmacy, but with detailed prenatal imaging, meetings with specialists, and honest discussion about what to expect during pregnancy and after birth. Because the condition can vary and is often life-limiting, non-drug care may range from comfort-focused support to surgery and rehabilitation in the uncommon babies who survive longer. Families may also need emotional support and genetic counseling alongside medical care.
Regular ultrasound scans and specialist fetal imaging help clarify how severely the chest, abdomen, spine, and limbs are affected. This can guide decisions about pregnancy care, delivery timing, and where birth should take place.
Meetings with maternal-fetal medicine doctors, newborn specialists, surgeons, and genetic counselors help families understand the diagnosis and likely outcomes. Not every approach works the same way, because limb body wall complex can differ a lot from one pregnancy to another.
A clear delivery plan can reduce uncertainty on a day that is already overwhelming. It may cover where the baby should be born, whether immediate intensive care is likely to help, and what comfort-focused care should look like if needed.
Perinatal and newborn palliative care focuses on comfort, bonding, and relief of distress when long-term survival is unlikely. Supportive therapies can also help parents create a care plan that matches their wishes and values.
Your genes may have an impact on how drugs work for you
For limb body wall complex, genetic differences usually do not play a major role in choosing medicines, because care is most often centered on pregnancy monitoring, birth planning, and comfort-focused support rather than ongoing drug treatment. In other words, there are no well-established medicines for this condition where a person’s inherited makeup is known to reliably change how well the drug works or how likely it is to cause side effects. If medicines are needed during pregnancy or around delivery, they are usually chosen based on the pregnant person’s health needs and the baby’s overall situation, not on known gene-based drug response patterns for limb body wall complex itself.
Pharmacological treatments
For limb body wall complex, there is no medication that can correct the underlying changes in how the body formed before birth. In practice, drug treatment for limb body wall complex is usually limited to supportive care, most often during pregnancy planning, labor and delivery, or comfort care after birth. Not everyone responds to the same medication in the same way, and the exact medicines used depend on the baby’s condition and the goals of care.
There are no approved medicines that can reverse or repair limb body wall complex itself. This means treatment focuses on support and comfort rather than fixing the condition.
If a baby is born alive, doctors may use morphine or fentanyl to ease pain or distress as part of comfort-focused care. These medicines do not treat the birth differences, but they can help make breathing discomfort or visible distress less severe.
In some cases, midazolam or similar sedatives may be used if there is marked agitation or air hunger. Finding the right medication can be a process of trial, patience, and adjustment, especially when the goal is gentle symptom relief.
No medicine taken during pregnancy has been shown to treat or cure limb body wall complex once it has developed. Drugs used in pregnancy, such as pain medicine during labor or anesthesia for delivery, are chosen for the pregnant parent’s needs rather than as treatment for the condition.
Genetic influences
When limb body wall complex is found during pregnancy, many families immediately wonder whether it was inherited. It’s natural to ask whether family history plays a role. In most reported cases, limb body wall complex does not appear to be passed down through families in a simple, predictable way, and most families have no prior history of it. Researchers think genetics may contribute in some pregnancies, but no single gene has been shown to explain most cases, and early problems in fetal development are also likely important. Because rare chromosome changes or other genetic findings can sometimes be present, doctors may offer genetic testing and genetic counseling to help clarify whether limb body wall complex is inherited in that pregnancy and what it may mean for future pregnancies. In general, the chance of limb body wall complex happening again is thought to be low, although the exact risk depends on whether testing finds an underlying genetic change.
Is Limb body wall complex genetic?
Genetics do not seem to play a major role in Limb body wall complex for most families. Most cases are thought to happen sporadically, with no clear inherited pattern and no single genetic change consistently linked to Limb body wall complex.
Having a genetic risk is not necessarily a diagnosis
Genetic variants are a usual part of human biology and are widespread in the general population. Most do not directly affect health and simply reflect natural human diversity. For many genes, having a variant tied to a condition suggests a possible association rather than a definite diagnosis, especially when several genes and environmental factors are involved. In some situations, though, one well-characterized variant in a particular gene can be enough to confirm a diagnosis.
Pharmacogenetics—how genetics influence drug effects
For families facing limb body wall complex, treatment decisions are usually shaped much more by the baby’s specific physical differences and which organs are affected than by pharmacogenetic test results. Limb body wall complex is a serious birth condition, and care often centers on pregnancy monitoring, delivery planning, comfort-focused care, and, in selected situations, surgery or intensive newborn support rather than long-term drug treatment. At this point, there is no well-established gene test that tells doctors which medicines work best specifically for limb body wall complex, and no known limb body wall complex-specific drug response pattern is used in routine care. Not every difference in response is genetic, but when medicines such as pain relief, antibiotics, or anesthesia are needed, doctors usually choose them based on the baby’s size, organ function, and overall stability. Because the causes of limb body wall complex are still not fully understood and most cases appear to happen sporadically, genetics may be more useful for discussing recurrence risk and confirming the diagnosis than for choosing medications. So, when families ask how genetics affect treatment for limb body wall complex, the current answer is that genetics has a limited role in drug selection, while careful supportive care remains the main guide.
Interactions with other conditions
Limb body wall complex is usually not thought of as a condition that directly interacts with other diseases later in life, because it is a severe pattern of birth defects that develops very early in pregnancy. Instead, the main medical issue is that people with limb body wall complex often have multiple major problems at the same time, such as changes affecting the limbs, chest or belly wall, spine, or internal organs, and these can strongly affect each other. Doctors call it a comorbidity when two conditions occur together, but in this setting the overlap is usually between limb body wall complex and other structural abnormalities present from birth rather than a separate disease causing it. For families asking about limb body wall complex and related conditions, it is important to know that it is not commonly linked to a predictable set of later diseases in the way some genetic syndromes are. Care usually focuses on understanding the full range of associated abnormalities and how they affect breathing, feeding, movement, and overall survival.
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 Limb body wall complex?
Doctors may also think about amniotic band sequence, where strands from the sac around the baby can damage the limbs or body wall, and abdominal wall defects such as omphalocele or gastroschisis, where the intestines or other organs develop outside the belly. Other rare problems that can look similar on a pregnancy scan include body stalk anomaly and pentalogy of Cantrell, which can also cause severe changes in the chest or belly wall and other major birth defects.
History
For many families, limb body wall complex enters the picture during pregnancy, often after an ultrasound shows that the baby is developing in a very unusual way. The condition was not clearly recognized as its own pattern until modern prenatal imaging and careful study after birth made it easier to connect the same group of findings across different pregnancies.
First described in the medical literature as a distinct pattern in the late 20th century, limb body wall complex was identified when doctors noticed a repeated combination of major differences affecting the body wall, limbs, and the way some organs develop outside the body. Earlier cases were sometimes grouped under other names or described one feature at a time, which made the history harder to piece together. As medical science evolved, specialists began to separate limb body wall complex from other conditions that can also cause abdominal wall openings or limb differences.
That shift mattered because it improved diagnosis and counseling. With better ultrasound technology, doctors could often recognize limb body wall complex during pregnancy rather than only after delivery. This also helped researchers describe the early symptoms of limb body wall complex more consistently on prenatal scans, including severe body wall changes and differences in the baby’s position or development.
Over time, doctors have proposed several explanations for why limb body wall complex happens. Some focused on changes early in embryonic development, while others looked at disruptions in blood flow or the amniotic sac. No single explanation has fully accounted for every case, and limb body wall complex may not look exactly the same in every pregnancy.
In recent decades, awareness has grown as imaging, fetal medicine, and pathology have all improved. Today, the history of limb body wall complex is still being refined, but the overall picture is much clearer than it once was. Knowing this history can help explain why older records may use different terms, and why careful review by experienced specialists is often important when the diagnosis is being discussed.