Subperiosteal leiomyosarcoma of the tibia.
Primary leiomyosarcoma of bone is a rare malignant tumor of smooth muscle. We report a case of low-grade subperiosteal primary bone leiomyosarcoma in the tibial diaphysis, which radiologically appeared to be osteoid osteoma. A 35-year-old man presented with a several-year history of a palpable hard nodule in the distal left leg, which had enlarged and become painful over the previous 2 years. Radiographs showed solid periosteal reaction with a well-defined lytic lesion in the posteromedial cortical border of the left tibial diaphysis. Computed tomography demonstrated a small, well-defined lytic lesion, not calcified, in a subperiosteal location, surrounded by solid periosteal bone formation. The lesion was excised en bloc and the histological diagnosis of a low-grade leiomyosarcoma was made. To the best of our knowledge, the surface location of primary bone leiomyosarcoma has not been previously described in the literature.
Narváez
J A
JA
Department of Radiology, Hospital Universitari de Bellvitge, Barcelona, Spain.
De Lama
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E
Portabella
F
F
Ortega
R
R
Condom
E
E
D000328:Adult; D001859:Bone Neoplasms / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D018483:Diaphyses / Q000000981:diagnostic imaging; D005500:Follow-Up Studies; D006801:Humans; D007890:Leiomyosarcoma / Q000000981:diagnostic imaging*; D008297:Male; D010017:Osteoma, Osteoid / Q000175:diagnosis; D010521:Periosteum / Q000000981:diagnostic imaging; D013977:Tibia / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed