Wong et al Brunei International Medical Journal 2025;21:121-124 Brunei International Medical Journal Acute Adhesive Small Intestinal Obstruction with Secondary Jejunal Volvulus WONG Winn Lung1,2, Jien Yen SOH1,2, Muhammad Faeid OTHMAN1,2, Wan Zainira WAN ZAIN1,2, Mohd Nizam MD HASHIM1,2, Chiew Chea LAU3