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.
Hatano
Hiroshi
H
Department of Orthopedic Surgery, Niigata Cancer Center Hospital, 2-15-3 Kawagishi-Cho, 951-8566 Niigata City, Japan. hatanoh@niigata-cc.jp
Morita
Tetsuro
T
Kobayashi
Hiroto
H
Segawa
Hiroyuki
H
Honma
Keiichi
K
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