Recurrent Leiomyosarcoma of External Oblique Muscle Detected on 99mTc-MDP SPECT/CT.

A Tc-MDP bone scintigraphy was performed in an 88-year-old man with a history of right external oblique muscle leiomyosarcoma, which was resected 8 months ago. The static images showed abnormal tracer uptake in the region of resection bed. SPECT/CT images demonstrated that the increased activity was from a partially calcified soft tissue mass in external oblique muscle. Subsequent pathological examination confirmed recurrent tumor.