title: Parosteal lipoma with hyperostosis: case report.
abstract: Parosteal lipoma is an extremely rare benign tumor that is composed mainly of mature adipose tissue and has an intimate relationship to the underlying periosteal bone. We present a case of parosteal lipoma of humerus combined with hyperostosis. Standard radiography demonstrated a radiolucent mass surrounding an exostosis. CT showed a fat density, lobulated mass surrounding the larger osseous excrescence and cortex. The patient underwent surgery. Intraoperative examination found a well encapsulated, homogenous, yellowish, fatty tissue attached by a stalk to the underlying bone. The pathology specimen showed mature adipose tissue consistent with the intraoperative finding.
authors.affiliation: Department of Radiology, Addis Ababa University, Ethiopia.
authors.forename: Ferehiwot
authors.initials: F
authors.lastname: Bekele
authors.forename: Ephrem
authors.initials: E
authors.lastname: Gebrehana
authors.forename: Biniam
authors.initials: B
authors.lastname: Tsegaye
authors.forename: Daniel
authors.initials: D
authors.lastname: Admassie
mesh_terms: D000328:Adult; D001132:Arm / Q000473:pathology / Q000503:physiopathology; D001859:Bone Neoplasms / Q000473:pathology*; D004210:Dissection / Q000379:methods*; D005096:Exostoses / Q000473:pathology*; D005260:Female; D006801:Humans; D006811:Humerus / Q000473:pathology*; D008067:Lipoma / Q000150:complications / Q000473:pathology / Q000503:physiopathology / Q000601:surgery; D018908:Muscle Weakness / Q000209:etiology / Q000503:physiopathology; D010521:Periosteum / Q000473:pathology*; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome