title: Immunohistology of gastrointestinal carcinoid tumors.
abstract: DAKO quick staining kits were used to immunostainings for Epithelial Membrane Antigen (EMA) Neuron Specific Enolase (NSE) and S-100 protein (S-100) in 18 carcinoid tumors of the gastrointestinal tract classified according to Soga and Tazawa. EMA was always absent in carcinoid tumors, being at the same time present within glandular epithelium. 88% of cases showed positive immunostaining for NSE. S-100 immunostaining showed immunopositive stellate cells present within the tumor especially within type A carcinoids. In addition in one carcinoid tumor thick, strongly S-100 positive bundles were noticed at the periphery of nests of tumor cells. Combined immunohistochemical and ultrastructural studies are needed to elucidate interrelation of neoplastic and neural elements within carcinoid tumorsa.
authors.affiliation: Department of Cell Pathology, N. Copernicus University Medical School, Kraków, Poland.
authors.forename: J
authors.initials: J
authors.lastname: Stachura
authors.forename: M
authors.initials: M
authors.lastname: Pietroń
authors.forename: K
authors.initials: K
authors.lastname: Nowak
authors.forename: Z
authors.initials: Z
authors.lastname: Rudzki
authors.forename: W
authors.initials: W
authors.lastname: Nowak
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002277:Carcinoma / Q000378:metabolism* / Q000473:pathology; D002648:Child; D005260:Female; D005770:Gastrointestinal Neoplasms / Q000378:metabolism* / Q000473:pathology; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008875:Middle Aged; D010751:Phosphopyruvate Hydratase / Q000378:metabolism*; D009418:S100 Proteins / Q000378:metabolism*
chemical_list: D009418:S100 Proteins; D010751:Phosphopyruvate Hydratase