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A lipoma is a benign tumor made of fat tissue. [1] They are generally soft to the touch, movable, and painless. [1] They usually occur just under the skin, but occasionally may be deeper. [1] Most are less than 5 cm (2.0 in) in size. [2] Common locations include upper back, shoulders, and abdomen. [4] It is possible to have several lipomas. [3]
Spindle cell lipoma is most frequently located in the upper back, shoulder, or posterior neck subcutaneous layer. [3] Nonetheless, reports of it occurring in the mediastinum, hypopharynx, larynx, anterior neck, suprasellar region, esophagus, nasal vestibule, tongue, floor of mouth, vallecula, parotid gland, and breast have been made. [4]
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 ...
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In 1993, a genetic polymorphism within lipomas was localized to chromosome 12q15, where the HMGIC gene encodes the high-mobility-group protein isoform I-C. [2] This is one of the most commonly found mutations in solitary lipomatous tumors but lipomas often have multiple mutations. Reciprocal translocations involving chromosomes 12q13 and 12q14 ...
Most cases of pleomorphic lipoma are seen in the subcutaneous tissue of the back, shoulder, and posterior neck. [2] Less commonly, it can also happen in odd places like the tongue, [3] vulva, [4] palm, [5] tonsillar fossa, [6] orbit, [7] and oral cavity. [8] The lesion usually presents as a subcutaneous lump that is circumscribed, like the ...
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 ...
Angiolipoma is a subcutaneous nodule with vascular structure, having all other features of a typical lipoma. They are commonly painful. [1]: 624 [2] Angiolipomas manifest as multiple painful subcutaneous nodules commonly on the upper limbs. The can occur sporadically, with a family history or after trauma.