Case report 596

Abstract

* Supported in part by VA Grant =~ SA306 Address reprint requests to: Donald Resnick, M.D., Department of Radiology, VA Medical Center, 3350 La Jolla Village Drive, San Diego, CA 92161, USA tory o f t r auma , and the pa t i en t is o therwise heal thy. M o d e r a t e l imi tat ion o f left h ip f lexion was present . Conven t i ona l r o e n t g e n o g r a m s d e m o n s t r a t e d a calcif ied o r ossif ied mass pos t e r io r to the head o f the left femur (Fig. 1). A c o m p u t e d t o m o g raph ic (CT) scan (Fig. 2) d e m o n s t ra ted a 5 . 5 x 3 . 0 c m i r regular , a m o r p h o u s , dense mass ar is ing f rom the do r sa l aspect o f the pos t e r io r colu m n o f the left a c e t a b u l u m ; the mass was b r o a d b a s e d and wi thou t a defini te assoc ia ted soft t issue mass. A 99m-Tc me thy lene d i p h o s p h o n a t e bone scan d e m o n s t r a t e d increased up t ake in the left pos t e r io r ace tabular region. CT o f the chest was no r mal . A n incis ional b iopsy and subsequent excis ion o f the lesion were performed.