CAP Foundation September Case of the Month Available

| September 8, 2011
September 2011

September Case Photo
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Case of the Month is a resource for pathologists to assess theirdiagnostic skills using digital whole slide imaging. Posted cases are selected from the CAP archives of the Performance Improvement Program in Surgical Pathology (PIP).
 

CLINICAL SUMMARY

LEFT PELVIS

A 49-year-old woman, with a radiologically aggressive pelvic mass underwent a left hemipelvectomy. A 15.0 x 11.0 x 9.0 cm tan-yellow mass occupying the medullary cavity of the iliac bone and extending into the surrounding soft tissues was identified. The cut surface of the mass was variegated tan-brown and myxoid with large foci of necrosis intermixed with areas having a more blue-gray chondroid appearance.

The master list with the correct answer

  1. Chondroblastic osteosarcoma
  2. Chondrosarcoma
  3. Dedifferentiated chondrosarcoma
  4. Enchondroma
  5. Synovial chondromatosis

View the appropriate diagnosis, critique and references

PREVIOUS CASE: MEDIASTINUM, POSTERIOR
A 32-year-old man with no significant previous medical history presented with sweating, headaches, and palpitations. A CT scan revealed a mass in his posterior mediastinum. Grossly, the 125 g mass measured 7.9 x 6.5 x 5.3 cm and was partially encapsulated with a deep red to pink cut surface. Sectioning revealed a single 3.1 cm cyst filled with serosanguinous fluid surrounded by red-pink, soft parenchyma. 
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Category: Digital Pathology News, Pathology News

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