Case 528 (P. McKee) Male 42 years, tumor on hand
Only two low-power views. Blue-staining epithelial tumour mass with extensive central necrosis. Unable to assess cytology.
This entity is a rare malignant sweat gland tumour arising on the digits. Described by Helwig in 1984, the histological features include a Grenz zone, fibrocollagenous stroma, a mixed tubuloalveolar and papillary pattern, and focal squamous metaplasia. Slow growing, painless, late diagnosis.
Case 576 (P. McKee) Female 43 years with a mass on 3rd finger involving bone.
Tubuloalveolar and ductal structures with areas of papillary projections protruding into cystic lumina - cellular atypia and pleomorphism. Some just call the tumour digital papillary adenocarcinomas without the word aggressive in the title as all are malignant. It is a rare carcinoma of the eccrine gland (however Ackerman regarded as being of apocrine origin and called it papillary carcinoma). This tumour can destroy bone.
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