RESIDENT CASE STUDIES

Week 11 June 28 - July 4, 2003: Case 1

Table of Contents | List of Diagnoses | Case 1 | Case 2 | Case 3

32 year old male with right knee mass that is negative for actin, desmin, and Myo D1 with no SSX/SSY translocation

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Questions:

1. The histologic features are most consistent with:
   1. Monophasic synovial sarcoma
   2. Rhabdomyosarcoma 
   3. Chondrosarcoma
   4. Epithelioid sarcoma
   5. Leiomyosarcoma

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2. The following is true of the tumor:
   1. It is most commonly found in infants
   2. It is characteristically immunoreactive for vimentin and cytokeratin
   3. It is characteristically immunoreactive for smooth muscle actin and vimentin
   4. It is characteristically immunoreactive for myo D1 and vimentin
   5. It is an indolent tumor that rarely metastasizes

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Week 11 Case 1 Discussion