[Nephrotic Syndrome Caused by AA Amyloidosis Secondary to Unicentric Castleman's Disease:Report of One Case].

AA amyloidosis is a rare systemic complication caused commonly by chronic inflammatory arthritis,periodic fever disease,vasculitis,tumors,etc.Castleman's disease is an uncommon cause of AA amyloidosis.Here,we reported a case of unicentric Castleman's disease-induced AA amyloidosis with nephrotic syndrome as the main manifestation.