Autopsy and Case Reports
https://autopsyandcasereports.org/article/doi/10.4322/acr.2020.145
Autopsy and Case Reports
Clinical Case Report

Unusual abscess masquerading as poorly differentiated adenocarcinoma of the colon showing characteristics of choriocarcinoma

Antigony Mitselou; Anna Varouktsi; Stamatis S. Papadatos; Eugenia Balasi; Evangeli Lampri; Konstantinos Katsanos; Vasiliki Galani

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Abstract

Extragonadal non-gestational choriocarcinoma (ENC) is an uncommon malignant tumor occasionally found in the gastrointestinal tract. ENC is characterized by a biphasic tumor growth with distinct areas of adenocarcinoma and choriocarcinoma differentiation. Primary choriocarcinoma of the colon is extremely rare, with only 21 cases reported in the literature. Most of the perforation of colorectal cancers occurs in the abdominal cavity, while abdominal wall abscess is rare; the psoas abscess associated with colon carcinoma is even less observed. Herein, we report the case of a 61-year-old female with poorly differentiated adenocarcinoma of the ascending colon and sigmoid, with choriocarcinomatous differentiation, masquerading a psoas abscess formation. Unfortunately, despite the aggressive therapy, the patient’s disease rapidly progressed, and she died within 2 months after the diagnosis. The typical morphological pattern, immunohistochemistry, and its correlation with serum β-human chorionic gonadotropin enabled a correct diagnosis.

Keywords

Adenocarcinoma, Choriocarcinoma, Abscess, Colon, Extragonadal Nongestational Choriocarcinoma

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Publication date:
05/29/2020

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