Ectopic thyroid carcinoma in the nasal septum: A case report.

INTRODUCTION AND IMPORTANCE: Ectopic thyroid carcinoma often occurs in the neck, and metastatic carcinoma of the nasal cavity and sinuses is extremely rare.

CASE PRESENTATION: An 11-year-old female was admitted to the hospital for one week due to nasal pain without an obvious cause and blood in the nose. A pale red mass with a peduncle at the back end of the right nasal septum was seen during the operation. Immunohistochemistry showed low-grade papillary thyroid carcinoma.

CLINICAL DISCUSSION: Surgeons should be alert to the possibility of ectopic thyroid tissue and related diseases, Patients with suspected malignant lesions should undergo routine pathological examination, and even a normal thyroid should be checked for malignant changes to avoid negative outcomes.

CONCLUSION: Although nasal endoscopic surgery is mature, for tumors with unclear properties, it is still necessary to undergo routine pathological examination to avoid habitual errors.