Carcinoid tumors of the gastrointestinal tract.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002276:Carcinoid Tumor / Q000175:diagnosis / Q000473:pathology; D002648:Child; D005260:Female; D005770:Gastrointestinal Neoplasms / Q000175:diagnosis / Q000473:pathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009928:Organ Specificity; D012737:Sex Factors