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

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  • AKAISHI Chika
    Department of Gastroenterology, Iwate Prefectural Chubu Hospital.
  • SANO Toshikazu
    Department of Gastroenterology, Iwate Prefectural Chubu Hospital.
  • ABE Hiroko
    Department of Gastroenterology, Iwate Prefectural Chubu Hospital.
  • SUGAI Tamotsu
    Department of Pathology, Iwate Medical University School of Medicine.

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  • 内視鏡的粘膜下層剝離術にて切除した右梨状陥凹に発生した脂肪腫の１例

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Abstract

<p>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.</p>

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