Follicular Thyroid Carcinoma Metastasis to the Retromolar Trigone: A Case Report

TL;DR

A rare case of follicular thyroid carcinoma metastasizing to the retromolar trigone in a patient with a history of thyroid cancer is reported, highlighting the need for vigilance in unusual oral lesions.

Contribution

This case report adds to the limited literature on FTC metastasis to the retromolar trigone and emphasizes diagnostic considerations in such atypical presentations.

Findings

A 48-year-old woman with prior FTC treatment presented with a retromolar mass confirmed as metastatic FTC.

Conservative surgery and radioactive iodine therapy led to complete resolution of the lesion with no recurrence after six months.

Abstract

Follicular thyroid carcinoma (FTC) may occasionally present with metastatic disease at atypical oral sites. This report describes a case of FTC involving the retromolar trigone. A 48-year-old woman with a history of FTC treated a decade earlier with total thyroidectomy and radioactive iodine therapy presented with a two-month history of a mass in the left retromolar region. Histopathological analysis of an incisional biopsy confirmed a metastatic well-differentiated follicular thyroid carcinoma. A conservative surgical approach involving left-sided modified radical neck dissection, followed by radioactive iodine management, caused complete resolution of the patient’s retromolar lesion. Follow-up over six months showed no evidence of recurrence. This case highlights a rare presentation of FTC metastasizing to the retromolar trigone. It underscores the importance of maintaining a high index of suspicion for metastatic disease in unusual oral lesions in patients with a history of thyroid cancer.

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