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Collision tumors in the gastrointestinal tract: a rare case series

Authors Aruna Bhattacharya A, Rama saha, Biswas, Jhuma biswas, ghosh B

Received 10 July 2012

Accepted for publication 17 August 2012

Published 25 October 2012 Volume 2012:5 Pages 73—77


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 5

Aruna Bhattacharya,1 Rama Saha,1 Jayanta Biswas,2 Jhuma Biswas,1 Biswajit Ghosh1

1Institute of Postgraduate Medical Education and Research, 2NRS Medical College and Hospital, Kolkata, West Bengal, India

Abstract: A collision tumor is one where histology shows the presence of two distinct primaries involving the same organ without intermixture of individual cell types, ie, a side by side pattern. Here we present three rare cases of collision tumors involving the stomach and transverse colon. There were two cases of collision tumors involving the stomach, one of which was a combination of adenocarcinoma and low-grade non-Hodgkin's (mucosa-associated lymphoid tissue) lymphoma, and the other showed the presence of non-Hodgkin's lymphoma involving the entire stomach wall along with adenocarcinoma infiltrating the muscle layer. The third case comprised a mucinous adenocarcinoma and carcinoid tumor in the large gut.

Keywords: collision tumor, histology, gastrointestinal tract

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