This table lists symptoms that people with this disease may have. For most diseases, symptoms will vary from person to person. People with the same disease may not have all the symptoms listed. This information comes from a database called the Human Phenotype Ontology (HPO) . The HPO collects information on symptoms that have been described in medical resources. The HPO is updated regularly. Use the HPO ID to access more in-depth information about a symptom.
|Medical Terms||Other Names||
|100% of people have these symptoms|
|Merkel cell skin
|30%-79% of people have these symptoms|
|Chronic noninfectious lymphadenopathy||0002730|
Photosensitive skin rashes
Sensitivity to sunlight
Sun sensitivity[ more ]
|Regional abnormality of skin||0011356|
|5%-29% of people have these symptoms|
|Basal cell carcinoma||0002671|
|Squamous cell carcinoma of the skin||0006739|
|1%-4% of people have these symptoms|
|Abnormal brain FDG positron emission tomography||0012658|
|Neoplasm of the outer ear||
Outer ear tumor
Having one or more risk factors does not mean that a person will develop MCC. Most people with risk factors will not develop MCC.
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Research helps us better understand diseases and can lead to advances in diagnosis and treatment. This section provides resources to help you learn about medical research and ways to get involved.
Support and advocacy groups can help you connect with other patients and families, and they can provide valuable services. Many develop patient-centered information and are the driving force behind research for better treatments and possible cures. They can direct you to research, resources, and services. Many organizations also have experts who serve as medical advisors or provide lists of doctors/clinics. Visit the group’s website or contact them to learn about the services they offer. Inclusion on this list is not an endorsement by GARD.
Living with a genetic or rare disease can impact the daily lives of patients and families. These resources can help families navigate various aspects of living with a rare disease.
These resources provide more information about this condition or associated symptoms. The in-depth resources contain medical and scientific language that may be hard to understand. You may want to review these resources with a medical professional.
Got a Great Research Idea? ‘All of Us’ Wants to Hear It!
January 18, 2018
New NCATS Rare Diseases Research Video
December 27, 2017
Rare Disease Day at NIH on March 1, 2018
December 19, 2017
FDA Patient Representative Program
January 11, 2017
Questions sent to GARD may be posted here if the information could be helpful to others. We remove all identifying information when posting a question to protect your privacy. If you do not want your question posted, please let us know. Submit a new question
Is Merkle cell carcinoma hereditary? See answer
My brother recently passed away from Merkel cell carcinoma. How long would it have taken from the very first stage to an advanced state or death? See answer
Can you catch this cancer from a husband that you are close to and kiss every day? See answer
When staging Merkel cell carcinoma with sentinel lymph node biopsy, is the use of a tracer as effective as blue dye for identifying the sentinel lymph node? What is the role of Mohs surgery for treating Merkel cell carcinoma? See answer