title: Lipoma arborescens associated with osseous/chondroid differentiation in subdeltoid bursa.
abstract: Lipoma arborescens (LA) is a rare benign lesion of unknown etiology. It is characterized histologically by villous proliferation of the synovial membrane and diffuse replacement of the subsynovial tissue by mature fat cells. This condition affects the knee joint most commonly. Cases involving other locations including glenohumeral joint,[1] hip,[2] elbow,[3] hand[4] and ankle[5] have been rarely described. Involvement of the subdeltoid bursa has also been reported, but to date no case has described LA with osseous/chondroid differentiation of this bursa. Another significant finding in our case was the coexistence of LA with intermuscular lipoma, SLAP lesion and labral cyst.
authors.affiliation: Department of Orthopaedic Surgery, School of Medicine, Inha University, Incheon, Korea.
authors.forename: Ryuh Sup
authors.initials: RS
authors.lastname: Kim
authors.forename: Young Tae
authors.initials: YT
authors.lastname: Kim
authors.forename: Jong Min
authors.initials: JM
authors.lastname: Choi
authors.forename: Sang Hyun
authors.initials: SH
authors.lastname: Shin
authors.forename: Yeo Ju
authors.initials: YJ
authors.lastname: Kim
authors.forename: Lucia
authors.initials: L
authors.lastname: Kim
keywords: Labral cyst; SLAP lesion; lipoma; lipoma arborescens; osseous/chondroid differentiation; shoulder; subdeltoid bursa