College of American Pathologists

2012 — September Case of the Month

Posted October 10, 2012


CAP Foundation Online Case of the Month

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A 45-year-old man presented with six month history of increasing cough and vague discomfort in the chest. A CT scan revealed a large anterior mediastinal mass compressing the heart. The mass was resected. The resected specimen consisted of an unencapsulated, well-circumscribed mass covered by smooth fibromembranous tissue and measuring 12.0 x 10.0 x 8.0 cm. On sectioning, the cut surfaces were yellow tan and lobulated.

The master list with the correct answer

  • Desmoid tumor
  • Low grade fibromyxoid sarcoma with giant collagen rosettes
  • Malignant peripheral nerve sheath tumor
  • Myxofibrosarcoma
  • Myxoid liposarcoma
  • Schwannoma
  • Solitary fibrous tumor

Access Case Critique to view:

  • Appropriate diagnosis
  • Critique
  • References

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