XXXX arising in the buttock.

@entity1 @entity242 @entity8650 @entity5 @entity421 @entity3
@entity421 is a rare @entity242 that accounts for about 1% of @entity8650 . We report an very unusual case of a @entity421 arising in the superficial subcutaneous region of the buttock. The @entity1 was a 55 year-old female. She incidentally noticed a small nodule in the right trochanteric region. It was removed under local anesthesia at a private clinic. An additional wide excision was performed at our hospital. There was an 8 mm? 10 mm mass in the subcutaneous tissue. No invasion of the underlying fascia was observed. Microscopic examination of the removed @entity5 showed bizarre-looking spindle and giant cells with lace-like osteoid. The @entity5 was diagnosed as @entity421 . Chemotherapy with Rosen T-20 was administered to the @entity1 . The @entity1 has survived without recurrence or @entity3 for 4 years since the primary surgery. Its superficial location, very small size, wide excision, and chemotherapy were thought to contribute to her long survival.
