Collision tumor at the rectum consisting of a neuroendocrine carcinoma and adenocarcinoma: A case report.

ABSTRACT:

Introduction and importance

Neuroendocrine carcinoma of the colon and rectum account for less than 1% of all colorectal malignancies. Here we report a case of a collision tumor at the rectum consisting of a neuroendocrine carcinoma and adenocarcinoma.

Case presentation

A 46-year-old asymptomatic female with severe anemia was referred by her primary care physician for admission. Initial imaging showed several innumerable heterogenous hypodense lesions within the liver. Following a colonoscopy and the excision of a rectal mass, the histopathology report revealed a Collision tumor.

Clinical discussion

There are no specific clinical features or imaging findings. The diagnosis is made post operatively dependent on histopathology.

Conclusion

It is essential to report

SUBMITTER: Nannar J 

PROVIDER: S-EPMC9110971 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature