Metastatic cutaneous carcinoid tumor mimicking an adnexal poroid neoplasm.
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.
Puri
Puja Kumari
PK
Department of Pathology, The George Washington University, Washington, DC 20037, USA. puripuja@gwu.edu
Galan
Anjela
A
Glusac
Earl J
EJ
Cowper
Shawn E
SE
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*
D014408:Biomarkers, Tumor