Castleman disease of the neck: A case report.

Castleman disease is a rare lymphoproliferative disorder with two distinctive presentations, namely Unicentric disease and Multicentric disease. Unicentric disease occurs as a solitary enlarged mass in the mediastinum and is rarely found in the head and the neck, whereas, Multicentric disease appears as a systemic disease with peripheral lymphadenopathy. Here we discuss an unusual case with characteristic clinical, radiologic and histologic findings of a 22-year-old male with Unicentric disease demonstrating a slow growing neck mass often times misdiagnosed as a lymphoma.