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What is BAP1 Tumour Predisposition Syndrome?

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Posted by fatima.shakeel@opmc.co | Jun 15, 2025

BAP1 Tumour Predisposition Syndrome is a rare genetic condition that increases a person’s risk of developing certain types of cancer. This happens because of a mutation (change) in a specific gene called BAP1.

Normally, this gene helps control how cells grow and divide, preventing them from turning into cancer. But when this gene doesn’t work properly, cells can grow abnormally, making it easier for cancers to form in different parts of the body.

Causes

This syndrome is usually inherited from one of the parents. If one parent carries the faulty gene, each child has a 50% chance of inheriting it. This kind of inheritance is known as autosomal dominant, meaning just one copy of the faulty gene is enough to cause the condition.

Types

People with BAP1 tumour Predisposition Syndrome have a higher risk of getting different kinds of cancer. These include uveal melanoma, which is a type of eye cancer; skin melanoma, which is a serious form of skin cancer; mesothelioma, which affects the lining of the lungs or abdomen; kidney cancer; and basal cell carcinoma, which is a more common but less aggressive skin cancer.

The exact type of cancer someone develops may vary, and not everyone with the gene mutation will develop all of these cancers.

Symptoms

The symptoms a person experiences depend on the type of cancer they might develop. For example, they may notice unusual moles or lumps on the skin that change in size or shape. Some may develop eye problems, such as blurry vision or seeing floating spots. If mesothelioma develops, a person might feel chest pain or shortness of breath. Blood in the urine or abdominal pain could signal kidney involvement.

Diagnosis

Diagnosis usually involves genetic testing, which looks for changes in the BAP1 gene. If the mutation is found, doctors recommend regular cancer screenings to catch any signs of disease early. This may include eye exams, skin checks, and body scans depending on the person’s health history and symptoms.’

Treatment

There is no cure for the genetic condition itself, but the key to managing it is early detection and prevention. People with this syndrome are advised to have frequent medical check-ups, especially for the skin, eyes, and internal organs.

Protecting the skin from sunlight and avoiding exposure to asbestos (a risk factor for mesothelioma) are also important preventive steps. If doctors find any suspicious growths, they usually remove them early to prevent cancer from spreading.

Prognosis

If cancers linked to this syndrome are found early, they can often be treated successfully. Regular monitoring and lifestyle adjustments can greatly improve a person’s quality of life and life expectancy. People with this syndrome are encouraged to work closely with their doctors to stay healthy and detect any problems as soon as possible.


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