Papillary Thyroid Carcinoma in Struma Ovarii.

Area of Science:

• Gynecologic Oncology
• Endocrinology
• Pathology

Background:

• Struma ovarii is a rare germ cell tumor predominantly composed of thyroid tissue, typically unilateral.
• Malignancy arising in struma ovarii is exceptionally uncommon.
• Pelvic masses in peri- and postmenopausal patients warrant a broad differential diagnosis.

Observation:

• A case of struma ovarii presenting as abdominal distension in a female patient.
• Surgical management involved total hysterectomy and bilateral salpingo-oophorectomy.
• Histopathology revealed mature thyroid follicles and a focal area with nuclear features of papillary thyroid carcinoma.

Findings:

• The diagnosis was struma ovarii with focal papillary thyroid carcinoma.
• No other teratomatous elements were identified in the resected specimen.
• Patient's thyroid hormone levels were within normal ranges.

Implications:

• Struma ovarii should be considered in the differential diagnosis of ovarian masses.
• This case underscores the rare possibility of malignant transformation within struma ovarii.
• Early recognition and appropriate surgical management are crucial for favorable outcomes.