Adenomyoma of the Vaterian Ampulla / 한국간담췌외과학회지

ABSTRACT

Adenomyoma is a non-neoplastic tumor-like lesion that frequently occurs in the gallbladder (GB), but it is very rarely seen in the Vaterian ampulla. The pathological findings of adenomyoma are characterized by the lobule containing hyperplasia of the smooth muscle cells and ductal or glandular structures. This tumor is clearly a benign disease. However, when it develops in the Vaterian ampulla, it may be mistaken for a periampullary malignancy and could be treated with extensive surgery such as pancreaticoduodenectomy (PD). We have experienced a case of adenomyoma of the Vaterian ampulla. The patient was a 69-year-old male who developed mild hyperbilirubinemia as an initial symptom. The preoperative radiologic and endoscopic findings suggested a periampullary mass, but we could not differentiate whether it was benign or malignant. PD was performed and adenomyoma was diagnosed by pathological examination after the surgery.