Localized amyloid deposition in the nasopharynx and neck, mimicking nasopharyngeal carcinoma with neck metastasis.
Amyloidosis results from the deposition of amyloid proteins in organs and tissues. Clinically, it can be classified into systemic and localized forms. Here, we report a case of localized amyloidosis of the nasopharynx and neck. The initial presentation was a nasopharyngeal mass, and bilateral neck masses, mimicking nasopharyngeal carcinoma with neck metastasis. Computed tomographic scans of the neck revealed asymmetry between the bilateral nasopharyngeal walls, and multiple radio-opaque masses in both sides of the neck. A nasopharyngeal biopsy was performed and confirmed amyloid deposition. Subsequent neck-mass excision biopsies confirmed that the neck masses were also amyloid deposits. Further laboratory examinations revealed no systemic involvement. There was no disease progression after local excision. Localized amyloidosis in the head and neck is rare, but can have various manifestations that may sometimes mimic neoplasms.
Zhuang
Yu-Long
YL
Department of Otolaryngology, Taipei Veterans General Hospital, Taipei, Taiwan, R.O.C.
Tsai
Tung-Lung
TL
Lin
Ching-Zong
CZ
D000368:Aged; D000369:Aged, 80 and over; D000682:Amyloid / Q000378:metabolism; D000686:Amyloidosis / Q000175:diagnosis* / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D009303:Nasopharyngeal Neoplasms / Q000175:diagnosis*; D009305:Nasopharynx / Q000000981:diagnostic imaging / Q000378:metabolism; D009333:Neck / Q000000981:diagnostic imaging; D009362:Neoplasm Metastasis; D014057:Tomography, X-Ray Computed
D000682:Amyloid