title: Pituitary macroadenoma in a patient with POEMS syndrome in conjunction with Castleman disease: first report of a case and review of related literature.
abstract: OBJECTIVE
  To describe the first reported case of a patient with POEMS syndrome (polyneuropathy, organomegaly, endocrinopathy, monoclonal gammopathy, and skin changes) in conjunction with the endocrinologic manifestation of panhypopituitarism due to a large clinically nonfunctioning pituitary adenoma.
  
  
  METHODS
  We present the clinical, laboratory, and radiologic details of the case and review the relevant updated literature.
  
  
  RESULTS
  A 48-year-old man with hypopituitarism and progressive polyneuropathy presented to an outside hospital with confusion and diaphoresis. He also had diffuse lymphadenopathy, monoclonal gammopathy, and skin lesions consistent with a diagnosis of POEMS syndrome. Cytopathologic study of a lymph node showed findings consistent with Castleman disease. A large suprasellar mass was found to be the cause of the hypopituitarism.
  
  
  CONCLUSIONS
  POEMS syndrome is a rare paraneoplastic condition, commonly associated with Castleman disease, that manifests with progressive distal polyneuropathy and a monoclonal plasma cell disorder, often accompanied by endocrinopathy, organomegaly, skin changes, sclerotic bone lesions, ascites, erythrocytosis, and thrombocytosis. Our current patient had all 5 classic features of POEMS syndrome along with some diagnostic elements of Castleman disease, sclerotic bone lesions, and thrombocytosis. To our knowledge, this is the first known reported case of a patient whose endocrinologic manifestation of POEMS syndrome was panhypopituitarism attributable to a large clinically nonfunctioning pituitary adenoma.
authors: Department of Endocrinology and Metabolism, Indiana University School of Medicine, Indianapolis, Indiana 46202, USA.
authors: Carolina
authors: C
authors: Bruno
authors: James D
authors: JD
authors: Fleck
authors: Melissa K
authors: MK
authors: Cavaghan
mesh_terms: D005871:Castleman Disease / Q000209:etiology* / Q000473:pathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D016878:POEMS Syndrome / Q000209:etiology* / Q000473:pathology; D010911:Pituitary Neoplasms / Q000150:complications* / Q000473:pathology