Focal lymphoid hyperplasia in a lipoma, mimicking liposarcoma.
Lipomas may contain nonadipose tissue, which can confound the correct imaging diagnosis because features of such neoplasms can mimic findings associated with well-differentiated liposarcomas. Intratumoral nonadipose tissue, such as muscle, cartilage, and fibrous tissue, may be present in lipomas; however, lymphoid hyperplasia in a lipoma is extremely rare. This report describes a case involving a heterogeneous lipoma in a 55-year-old woman in whom the heterogeneous portion of the tumor was in fact a reactive lymphoid hyperplasia encased by the lipoma. The imaging features of this lesion as well as pathological findings of this unusual tumor are discussed.
Department of Orthopedic Surgery, Niigata Cancer Center Hospital, 2-15-3 Kawagishi-Cho, 951-8566 Niigata City, Japan. hatanoh@niigata-cc.jp
Hiroshi
H
Hatano
Tetsuro
T
Morita
Hiroto
H
Kobayashi
Hiroyuki
H
Segawa
Keiichi
K
Honma
D005871:Castleman Disease / Q000473:pathology*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008067:Lipoma / Q000473:pathology*; D008080:Liposarcoma / Q000175:diagnosis; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D014057:Tomography, X-Ray Computed