Журнал клинических случаев

Huge Localized Amyloidosis of the Sinonasal Cavity: A Rare Case Report

Abstract

Kunihiro Nishimura, Shuho Tanaka, Yasuhiko Takahashi, Yasue Uchida, Tooru Tanigawa, Hiromi Ueda and Tetsuya Ogawa

Background: Amyloidosis is the general term for deposition of fibrous abnormal protein aggregates (amyloid) in organs or tissues that leads to dysfunction of the affected organs. Treatment and follow-up of localized amyloidosis are particularly difficult because its pathogenesis is still unclear. Localized amyloidosis of the head and neck is rare and that of the nose is rarer still. Here, we report a case of localized amyloidosis of the nasal cavity, which affected an area larger than those in previous reports. Case presentation: A 60-year-old woman presented with the chief complaints of headache, proptosis and nasal congestion. There was a lack of response to chemotherapy and endoscopic sinus surgery was performed. As of 18 months after surgery, subjective symptoms have been alleviated and are consistent with the objective findings. There have been no signs of recurrence. Conclusions: Cases of localized amyloidosis of the nasal cavity are rare, and standard treatment has not yet been established. In this case, proactive surgical intervention was successful for this condition.