Adenomyomatosis of the Gallbladder Associated with Pancreaticobiliary Maljunction -Report of 3 Cases-

Yoshiharu Nakamura¹⁾, Kaku Egami¹⁾, Masatomo Yoshioka¹⁾, Masayo Wada¹⁾, Susumu Yamamura¹⁾, Shotaro Maeda²⁾, Masaru Hosone²⁾, Eiji Uchida³⁾, Takashi Tajiri³⁾ and Masahiko Onda³⁾

¹⁾Department of Surgery, Tamanagayama Hospital of Nippon Medical School ²⁾Department of Pathology, Tamanagayama Hospital of Nippon Medical School ³⁾First Department of Surgery, Nippon Medical School

Adenomyomatosis of the gallbladder (ADM) associated with pancreaticobiliary maljunction (PBM) is rare, with only 28 cases ever having been reported in the Japanese literature. We have encountered a total of 3 such cases, including one case previously reported by us in our series of 60 PBM patients since 1986. Case 1 involved a 48-year-old female with PBM and Todani type IVa congenital biliary dilatation; Case 2, a 36-year-old male; and Case 3, a 14-year-old female, both of whom had PBM without associated biliary dilatation. All 3 cases had the generalized type (G type) of ADM. A review of all 30 cases, including our own, revealed the following characteristics of ADM associated with PBM as compared with ADM not associated with PBM: younger age (mean age: 36.3y/o), female>male (21/9), predominantly G type with respect to the location of the ADM (73.7%), lower association with gallstones, and a high frequency of P-C type union (90.5%)and non-biliary dilatation (78.6%). These findings seem to suggest an etiological relationship between ADM and PBM.

Key words
adenomyomatosis of the gallbladder, pancreaticobiliary maljunction

Reprint requests
Yoshiharu Nakamura Department of Surgery, Tamanagayama Hospital Nippon Medical School 1-7-1 Nagayama, Tama-city, Tokyo 206-8512 JAPAN

Accepted
November 29, 2000

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