Ectopic gallbladder (EGB) is a rare condition in which the gallbladder is located outside its normal anatomical position. Gallbladder duplication is an uncommon congenital anomaly, reported in approximately 1 in 4,000 individuals. Although usually asymptomatic, an unrecognized duplicated gallbladder may lead to significant complications, particularly when a second gallbladder is inadvertently left in situ following cholecystectomy. Ectopic gallbladders have been described in various abdominal locations, most commonly beneath the left hepatic lobe, intrahepatic, transverse, retrohepatic, retroperitoneal, within the lesser omentum, or embedded in the falciform ligament. We report the case of a 65-year-old woman who experienced recurrent episodes of abdominal pain and cholangitis for several years following a cholecystectomy performed in 2009. Multiple imaging investigations identified a cystic lesion within the right hepatic region. Interestingly, this lesion demonstrated an inconsistent appearance on liver magnetic resonance imaging, behaving as a “phantom cystic mass.” Surgical exploration, initially planned as a hepatic resection, revealed a cystic structure suggestive of a gallbladder located to the right of the falciform ligament and communicating with the left hepatic duct. Histopathological examination confirmed a true duplicated gallbladder. This finding explained both the patient's recurrent paroxysmal abdominal pain and the intermittent visualization of the cystic lesion on MRI, likely resulting from cyclical filling and emptying of the ectopic gallbladder. To our knowledge, this case describes a previously unreported clinicoradiological entity, for which we propose the term Khenchoul's syndrome, defined as an ectopic gallbladder located to the right of the falciform ligament. This case highlights the diagnostic challenges associated with gallbladder duplication after cholecystectomy and emphasizes the importance of meticulous intraoperative assessment and h