経鼻内視鏡下に摘出した上咽頭原発多形腺腫症例

Endoscopic transnasal resection of a primary nasopharyngeal pleomorphic adenoma: A case report

はじめに

　上咽頭には悪性腫瘍が多く発生するが，良性腫瘍の頻度は低い。また，多形腺腫は大唾液腺で最も多くみられる腫瘍であるが，上咽頭で発生することは稀であるとされる^1,2）。今回，われわれは上咽頭に発生し，経鼻内視鏡手術にて摘出しえた多形腺腫の1例を経験したので，文献的考察を含め報告する。

　Nasopharyngeal tumors are predominantly malignant, and benign tumors are rare. Pleomorphic adenomas, commonly occurring in major salivary glands, rarely arise in the nasopharynx. A 58-year-old female presented with persistent cough and sputum. Examination revealed a smooth mass in the right posterolateral nasopharynx. Biopsy and magnetic resonance imaging （MRI） confirmed a pleomorphic adenoma （10×9×10 mm）. Endoscopic transnasal resection, including septoplasty and partial resection of the middle turbinate was performed, and the tumor was excised with intact margins. Histopathological examination confirmed pleomorphic adenoma. Thus, endoscopic transnasal surgery is effective for treating nasopharyngeal pleomorphic adenomas and has minimal complications.