A case of colovesical fistula associated with pelvic arteriovenous malformation. - Nakayama, Yoko; Nakagawa, Akio; Hori, Hiroshige; Matsushita, Shuhei; Tanigawa, Kohei; Kawashima, Taro; Monma, Hiroyuki; Kobayashi, Iwao (Journal of Surgical Case Reports, 2026)