Malignant thymomas are rare tumors usually of a
mid-life to late adulthood.
|General Gross Description|
Grossly, these tumors can be quite large (up to 20 cm.
in diameter) and are significantly firmer than normal
Areas of calcification and cystic degeneration are
|General Microscopic Description|
Microscopically, these cells can be of 2 types.
The type 1 cancers are cytologically benign, but do
show some evidence of invasion of the capsule.
Type 2 tumors are more overtly malignant and are
typically squamous cell carcinomas, usually poorly
differentiated and show overt evidence of invasion and
Cotran RS, Kumar V, Robbins SL: Robbins Pathologic Basis of Disease. 5th ed. Philadelphia, W.B. Saunders, 1994, pp. 1168
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|Synopsis by: T.V.Rajan, M.D., Ph.D. (T98000M85803)