Extranodal follicular dendritic cell sarcoma of the pharyngeal region: a case report

抄録

Follicular dendritic cell sarcoma (FDCS) is a tumor of recent description that is frequently misdiagnosed because of its rarity and diverse histologic patterns. We herein present a case of FDCS of the pharyngeal region in a 62-year-old man. This case possessed histological features similar to those of Wegener's granulomatosis and NK/T cell lymphoma. A panel of antibodies was applied to help differential diagnoses for other possible lesions. Tumor cells were characterized by their immunoreactivity, i.e., CD21(+), CD23(+), CD35(+), and CD68(-). We also survey the clinical features and prognosis of 28 FDCS cases of the oronasopharyngeal region previously published.