Mucinous Cystadenocarcinoma Arising From a Mature Cystic Teratoma

TL;DR

This paper reports a rare case of a woman diagnosed with a rare type of ovarian cancer that developed from a benign tumor.

Contribution

The novelty lies in presenting a clinical case of mucinous cystadenocarcinoma arising from a mature cystic teratoma.

Findings

A woman presented with a large abdominal mass and ascites, later diagnosed as mucinous cystadenocarcinoma.

Histopathological analysis confirmed the tumor originated from a mature cystic teratoma.

The case highlights the diagnostic challenges of distinguishing between malignant transformation and collision tumors.

Abstract

Mucinous cystadenocarcinoma arising from mature cystic teratoma is an uncommon entity. The possibilities are either due to malignant transformation of benign teratoma into adenocarcinoma or a collision tumor between a mature cystic teratoma and a mucinous tumor. Here we present a case of a woman with abdominal distension and vague abdominal pain. Ultrasound abdomen showed a huge heterogeneous space-occupying lesion extending from the pelvis to the epigastrium with non-visualisation of the ovary, suggesting an ovarian origin. Further characterisation by contrast-enhanced computed tomography confirmed a hemorrhagic abdominopelvic multiseptate cystic lesion along with massive ascites. After surgery, the histopathological examination revealed mucinous cystadenocarcinoma arising from the mature cystic teratoma.

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