Small bowel (small intestine) - Decidual reaction

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Small bowel (small intestine)

Benign tumors and tumor-like conditions

Decidual reaction

Reviewer: Hanni Gulwani, M.D. (see Reviewers page)
Revised: 22 December 2012, last major update August 2012
Copyright: (c) 2003-2012, PathologyOutlines.com, Inc.

General
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● Rare lesion of decidual cells, usually in terminal ileum (Arch Pathol Lab Med 2010;134:378)
● May cause obstruction, severe bleeding

Micro description
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● Decidual cells (“glassy” with abundant eosinophilic cytoplasm) infiltrate bowel wall

Micro images
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Decidual cells with abundant eosinophilic cytoplasm, central nucleus, and no atypia

Differential diagnosis
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● Metastatic carcinoma
● Peritoneal malignant deciduoid mesothelioma
● Placental site trophoblastic tumor

End of Small bowel (small intestine) > Benign tumors and tumor-like conditions > Decidual reaction

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