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Angiolipoleiomyomas are acquired, solitary, asymptomatic acral nodules, characterized histologically by well-circumscribed subcutaneous tumors composed of smooth muscle cells, blood vessels, connective tissue, and fat. [7]: 627 Angiolipomas are painful subcutaneous nodules having all other features of a typical lipoma. [7]: 624 [9]
Benign symmetric lipomatosis, also known as Madelung's disease, is an adult-onset skin condition characterized by extensive symmetric fat deposits in the head, neck, and shoulder girdle area. [1] The symmetrical fat deposits are made of unencapsulated lipomas , which distinguishes it from typical lipomatosis which has encapsulated lipomas that ...
Dercum's disease — A rare condition characterized by painful fatty tumors in the adipose tissue commonly associated with obesity. Familial lipodystrophies - Multiple rare genetic syndromes characterized by loss of adipose tissue in certain areas of the body, which often cause Endocrine diseases .
There is an increased frequency in Okinawa, Japan, but this may be a reporting bias. The tumor develops very specifically in the subscapular or infrascapular area, deep to the muscle, sometimes even attached to periosteum of ribs. It is usually between the shoulder blade and the lower neck, with rare tumors reported in the chest wall. [1] [2] [4]
The lipomas are well-encapsulated, slow-growing, benign fatty tumors. The distribution is defined as being focused in the trunk of the body and extremities. [2] Familial Multiple Lipomatosis can be identified when multiple lipomas occur in multiple family members that span different generations. [2] Some people may have hundreds of lipomas ...
Hibernoma are most commonly identified in the subcutaneous and muscle tissue of the head and neck region (shoulders, neck, scapular), followed by thigh, back, chest, abdomen, and arms. In rare cases hibernoma may arise in bone tissue, however it is an incidental finding.
Chondroid lipoma is an uncommon soft tissue fatty tumor that can develop in deeper or superficial tissues. It often manifests as a painless mass. [3] The subcutis, superficial muscular fascia, or skeletal muscles of the limbs and limb girdles, trunk, head, and neck are where the majority of lesions are located. [4]
These other tumors along with some of their distinguishing histopathologic features are: 1) dysplastic lipomas (i.e. benign humors that have sites of tissue necrosis and neoplastic, variably-sized fat cells containing variable sized/shaped nuclei; these neoplastic cells, unlike most neoplastic cell in the liposarcomas, do not overexpress the ...