ENDOSCOPIC SUBMUCOSAL DISSECTION OF A PYRIFORM SINUS LIPOMA: A CASE REPORT

Abstract

An 83-year-old man presented with discomfort during swallowing. Endoscopy revealed a smooth, yellowish, submucosal tumor-like lesion in the right pyriform sinus of the hypopharynx. Computed tomography revealed a well-defined low absorbed mass beside the right pyriform sinus. Magnetic resonance imaging revealed a lesion that showed high signal intensity on T1- and T2-weighted images and low signal intensity on fat-suppressed T1-weighted images. No diffusion abnormality or contrast enhancement was observed. Based on the aforementioned findings, we suspected a lipoma in this patient. Endoscopic submucosal dissection was performed under general anesthesia after direct visualization of the larynx using a curved laryngoscope, following consultation with the Otorhinolaryngology Department. The lesion measured 45×13×15 mm, and histopathological evaluation of the resected specimen confirmed diagnosis of lipoma. The patient was symptom-free postoperatively.