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WHO Classification of Tumours
Adenosquamous carcinoma
Colon and rectum


Definition

A carcinoma composed of malignant glandular cells and malignant squamous cells.

Adenosquamous carcinoma of the colon and rectum
This unusual tumour has features of both squamous cell carcinoma and adenocarcinoma, either as separate areas within the tumour or admixed. This variant has more than just occasional small foci of squamous differentiation. Pure squamous cell carcinoma is very rare

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Bosman FT, Carneiro F, Hruban RH, Theise ND (Eds.)
WHO Classification of Tumours of the Digestive System.
4th Edition
International Agency for Research on Cancer: Lyon 2010



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