# When Teratomas Turn Brutal: From Indolent to Invasive in Stage IIIB Ovarian Squamous Cell Carcinoma

## TL;DR

A 74-year-old woman with rare ovarian squamous cell carcinoma arising from a teratoma highlights the importance of multidisciplinary care and early detection.

## Contribution

This case report highlights the rare transformation of a mature teratoma into squamous cell carcinoma and emphasizes mesoappendiceal involvement as a prognostic factor.

## Key findings

- Malignant transformation in mature teratomas is rare but clinically significant.
- Mesoappendiceal involvement independently contributes to upstaging and higher recurrence risk.
- Multidisciplinary care is essential for managing complex ovarian malignancies.

## Abstract

This case report identifies a 74-year-old female with Stage IIIB ovarian cancer, with a specific diagnosis of squamous cell carcinoma arising in a mature teratoma. She sustained surgical cytoreduction that included gynecologic oncology, general surgery, and urology. Post-operative care was coordinated to deal with early complications and recovery by working together as a multidisciplinary team. The case delves into the rare pathophysiology of malignant transformation in teratoma related to ovarian cancer, the principles of staging, and current treatment methods. This case further emphasizes the prognostic importance of mesoappendiceal involvement, a factor that independently contributes to upstaging and indicates a higher risk for recurrence. Follow-up care consisted of advanced imaging, options for adjuvant chemotherapy, and genetic counseling/referral for testing. This case report recognizes that early identification, the importance of multidisciplinary care, and follow-up based on rare ovarian malignancies are found in each of these issues.