Unicentric Retroperitoneal Mass: Castleman's Disease

Castleman's disease (CD) is a rare cause of lymphadenopathy. Its pathophysiology is unclear. It is usually asymptomatic and is incidentally detected. The treatment of unicentric CD is complete removal of the mass, and its recurrence is very rare. In this study, we present a male patient aged 36 years presenting with dyspepsia and incidentally diagnosed with unicentric CD by reviewing the data from literature.