Select tumour for C24.1 - Region of the ampulla of Vater:
 
The number attached to each tumour is the ICD-O morphology code of the International Classification of Diseases for Oncology (ICD-O) [1] and the Systematized Nomenclature of Medicine (http://snomed.org).
/0 benign tumours
/1 unspecified, borderline or uncertain behaviour
/2 in situ carcinomas
/3 malignant tumours.

1. Fritz A, Percy C, Jack A, Shanmuragatnam K, Sobin LH, Parkin DM, Whelan S (Eds) International Classification of Diseases for Oncology. World Health Organization: Geneva 2000





Premalignant lesions
        8211/0 Tubular adenoma, NOS
        8263/0 Tubulovillous adenoma, NOS
        8263/0 Papillotubular adenoma
        8261/0 Villous adenoma, NOS
        8261/0 Villous papilloma

Carcinoma
    8140/3 Adenocarcinoma, NOS
        8144/3 Adenocarcinoma, intestinal type
    8560/3 Adenosquamous carcinoma
    8310/3 Clear cell adenocarcinoma, NOS
    8310/3 Clear cell adenocarcinoma, mesonephroid
    8576/3 Hepatoid adenocarcinoma
    8260/3 Papillary adenocarcinoma, NOS
    8260/3 Papillary renal cell carcinoma
    8260/3 Papillary carcinoma of thyroid
    8480/3 Mucinous adenocarcinoma
    8480/3 Pseudomyxoma peritonei with unknown primary site
    8490/3 Signet ring cell carcinoma
    8070/3 Squamous cell carcinoma, NOS
    8020/3 Carcinoma, undifferentiated, NOS
    8035/3 Carcinoma with osteoclast-like giant cells

Neuroendocrine neoplasms
    8240/3 Carcinoid tumor, NOS
    8240/3 Typical carcinoid
    8240/3 Bronchial adenoma, carcinoid
    8249/3 Atypical carcinoid tumor
    8246/3 Neuroendocrine carcinoma, NOS
        8013/3 Large cell neuroendocrine carcinoma
        8041/3 Small cell carcinoma, NOS
        8041/3 Small cell neuroendocrine carcinoma
    8244/3 Mixed adenoneuroendocrine carcinoma
    8241/3 Enterochromaffin cell carcinoid
    8683/0 Gangliocytic paraganglioma
    8156/3 Somatostatinoma, malignant