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Lymphangioleiomyomatosis (LAM) Other names: lymphangiomyomatosis, LAM: Figure A shows the location of the lungs and airways in the body. The inset image shows a cross-section of a healthy lung. Figure B shows a view of the lungs with LAM and a collapsed lung (pneumothorax). The inset image shows a cross-section of a lung with LAM. Specialty ...
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.
lymphangioleiomyomatosis, and, clear-cell myomelanocytic tumour of ligamentum teres/falciform ligament. abdominopelvic sarcoma of perivascular epitheloid cells [2] primary extrapulmonary "sugar" tumour [2] Thus, it has been advocated that the above could be classified PEComas. [1]
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]
These tumours may also arise in the tunica dartos of the scrotum and the mammillary muscle of the nipple (genital leiomyoma), the smooth muscle of blood vessels (angioleiomyoma) and the lung (pulmonary lymphangioleiomyomatosis). [5] A pseudo-Darier sign may be present.
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 ...
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.
Lymphatic malformations are benign slow-flow type of vascular malformation of the lymphatic system characterized by lymphatic vessels which do not connect to the normal lymphatic circulation.