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an irregularly shaped lipoma involving the synovial membrane of a joint, resulting in fingerlike or treelike hyperplastic folds in the villi.
a fatty tumor of a joint, characterized by a treelike distribution of fat cells.
lipoma arborescensOrthopedics An arborescent intraarticular lipoma, usually seen in the knee associated with degenerative joint disease, rheumatoid arthritis, or joint trauma.
An abnormal treelike accumulation of fatty tissue in a joint.
See also: lipoma