title: Metastatic cutaneous carcinoid tumor mimicking an adnexal poroid neoplasm.
abstract: OBJECTIVE
  Metastatic cutaneous neoplasms may be difficult to differentiate from primary cutaneous neoplasms. Herein, we report an unusual case of metastatic cutaneous carcinoid tumor mimicking an adnexal poroid neoplasm.
  
  
  METHODS
  A 53-year-old male man presented with a neoplasm on the vertex of the scalp, clinically resembling a pigmented basal cell carcinoma.
  
  
  RESULTS
  A shave biopsy was suggestive of an apocrine poroma, however, a metastatic carcinoma could not be excluded. After acquiring additional clinical information and the complete excision of the neoplasm, further immunohistochemical stains supported the diagnosis a metastatic carcinoid tumor.
  
  
  CONCLUSIONS
  To our knowledge, this is the first case of metastatic carcinoid tumor reported that has mimicked a poroid neoplasm.
authors: Department of Pathology, The George Washington University, Washington, DC 20037, USA. puripuja@gwu.edu
authors: Puja Kumari
authors: PK
authors: Puri
authors: Anjela
authors: A
authors: Galan
authors: Earl J
authors: EJ
authors: Glusac
authors: Shawn E
authors: SE
authors: Cowper
mesh_terms: D006607:Adenoma, Sweat Gland / Q000175:diagnosis*; D001050:Apocrine Glands / Q000473:pathology*; D014408:Biomarkers, Tumor / Q000032:analysis; D002276:Carcinoid Tumor / Q000737:chemistry / Q000175:diagnosis* / Q000556:secondary / Q000601:surgery; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D008875:Middle Aged; D012878:Skin Neoplasms / Q000737:chemistry / Q000175:diagnosis* / Q000601:surgery; D013544:Sweat Gland Neoplasms / Q000175:diagnosis*
chemical_list: D014408:Biomarkers, Tumor