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Lymphangioleiomyomatosis (LAM) is a rare, progressive and systemic disease that typically results in cystic lung destruction. It predominantly affects women, especially during childbearing years. [ 1 ]
Mutations in TSC2 can cause Lymphangioleiomyomatosis, a disease caused by the enlargement of tissue in the lungs, creating cysts and tumours and causing difficulty breathing. Because tuberin regulates cell size, along with the protein hamartin, mutations to TSC1 and TSC2 genes may prevent the control of cell growth in the lungs of individuals.
Lymphangiomatosis is a condition where a lymphangioma is not present in a single localised mass, but in a widespread or multifocal manner. It is a rare type of tumor which results from an abnormal development of the lymphatic system.
These multifocal lesions are observed in tuberous sclerosis, [6] [7] and can be associated with lymphangioleiomyomatosis [8] and perivascular epithelioid cell tumour (PEComa or clear cell "sugar tumor")). [9] It can be diagnosed through lung biopsy using thoracoscopy. [10]
The precursor cell of PEComas is currently unknown; there is no normal counterpart "perivascular epitheloid cell". [1] Genetically, PECs are linked to the tuberous sclerosis genes TSC1 and TSC2, although this link is stronger for angiomyolipoma and lymphangioleiomyomatosis than for other members of the PEComa family.
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An infantile hemangioma, also called a strawberry angioma, on a child's arm. Angiomas usually appear at or near the surface of the skin anywhere on the body, and may be considered bothersome depending on their location.
They are also commonly found in women with the rare lung disease lymphangioleiomyomatosis. Angiomyolipomas are less commonly found in the liver and rarely in other organs. Whether associated with these diseases or sporadic, angiomyolipomas are caused by mutations in either the TSC1 or TSC2 genes, which govern cell growth and proliferation. They ...