title: Carcinoid syndrome with unknown primary: a case report.
abstract: Carcinoid syndrome usually is associated with a classic presentation, the diagnosis of which is supported by elevations in neuroendocrine substances such as 5-hydroxyindoleacetic acid and by localization and pathologic identification of a neuroendocrine tumor. The authors report a patient for whom there was a 7-year delay in diagnosis and even then a primary tumor could not be localized.
authors.affiliation: Section of Hematology and Oncology, Tulane University School of Medicine, New Orleans, Louisiana 70002, USA.
authors.forename: T
authors.initials: T
authors.lastname: Mahmood
authors.forename: R
authors.initials: R
authors.lastname: Mudad
mesh_terms: D006916:5-Hydroxytryptophan / Q000378:metabolism; D017809:Fatal Outcome; D006801:Humans; D006897:Hydroxyindoleacetic Acid / Q000378:metabolism; D008297:Male; D008303:Malignant Carcinoid Syndrome / Q000175:diagnosis*; D008875:Middle Aged; D009382:Neoplasms, Unknown Primary / Q000175:diagnosis*; D013997:Time Factors
chemical_list: D006897:Hydroxyindoleacetic Acid; D006916:5-Hydroxytryptophan