1. Maruta S, Tashiro S, Akahoshi N, et al: Carcinoid of papilla of Vater, Report of a case. Stomach and Intestine 1983 18:83–90, (in Japanese)
2. Jones MN, Griffith LM, West AB: Adenocarcinoid tumor of the periampullary lesion: A novel duodenal neoplasm presenting as biliary tract obstruction. Hum Pathol 1989 20:198–200
3. Shimoyama T, Kitasato S, Takagi T, et al: Coexisting carcinoid and carcinoma in the papilla of Vater, Report of a case. Stomach and Intestine 1981 16:589–593 (in Japanese)
4. Ishida M, Hosokawa M, Genba K, et al: A case of a gastric carcinoid tumor with a coexisting adenocarcinoma in the same tumor. Gan no Rinsho 1989 35:1687–1692 (in Japanese)
5. Miura K, Kanazawa M, Watanabe T, et al: A case of a gastric carcinoid with transient features of a tubular adenocarcinoma. Gan no Rinsho 1989 35:1693–1698 (in Japanese)