Laparoscopic cholecystectomy for acute cholecystitis in a patient with left-sided gallbladder: a case report
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Left-sided gallbladder is a relatively rare anatomical variation that is frequently associated with a biliary system anomaly. Here, we describe a case of left-sided gallbladder with acute cholecystitis treated by laparoscopic cholecystectomy.
An 86-year-old man with acute upper abdominal pain was admitted to our hospital. Computed tomography demonstrated that the gallbladder was centrally dislocated and the wall enhancement was discontinued. Magnetic resonance cholangiopancreatography showed that the gallbladder wall was thickened and abnormally swollen. A laparoscopic cholecystectomy was performed. The round ligament was attached to the right side of the gallbladder, and the left-sided gallbladder was diagnosed by intraoperative findings. The patient was discharged 5 days after surgery without postoperative complications.
A flexible and optimal port site should be inserted in cases of left-sided gallbladder with acute cholecystitis. An assessment of the extra- and intrahepatic biliary system is essential to avoid biliary injury in cases of left-sided gallbladder with acute cholecystitis.
KeywordsLeft-sided gallbladder Laparoscopic cholecystectomy Acute cholecystitis
Biliary duct injury
Left-sided gallbladder (LSG) is defined as a gallbladder whose floor is located on the left side of the round ligament of the liver . Laparoscopic cholecystectomy (LC) is the current gold standard treatment for acute cholecystitis. The 2018 Tokyo guidelines demonstrated that early cholecystectomy under strict criteria could lead to good surgical outcomes . Our previous data showed that early LC within 7 days after symptom onset is a feasible and safe treatment option . It is important to evaluate the preoperative biliary system to prevent intraoperative biliary injury. Of note, the intraoperative biliary injury rate in cases of LSG was around 7% , which is extremely high. It is well known that portal and biliary system variations are strongly associated with LSG. Detecting preoperative LSG is difficult due to its rarity and the similarity of its radiological findings to those of gallbladder torsion including gallbladder dislocation and cystic duct twisting . Here, we present a case of acute cholecystitis with LSG following LC with a literature review.
LSG is defined as a rare right-sided round ligament associated with intrahepatic biliary and portal system variations . The incidence of LSG without situs inversus is reportedly 0.2% . Several reports showed that intrahepatic portal vein and biliary system anomalies are rather common in cases of LSG [1, 7]. Attention should be paid to the intrahepatic portal and biliary system as well as cystic duct variations. In our case, the portal vein formed the right umbilical portion, to which the round ligament was attached.
From the hypothesis of LSG occurrence, two types of cystic duct anomalies have been reported : (1) a gallbladder that migrated to the left lobe, that is, a normal cystic duct location, and (2) a gallbladder that formed directly from the left hepatic duct and the cystic duct joining the common bile duct of the left hepatic duct from the left side . In our case, the cystic duct was recognized at the right side of the common bile duct, corresponding to the gallbladder migration type.
The preoperative diagnostic difficulty is due to its rarity and similar radiological findings to those of gallbladder torsion. Gallbladder torsion is highly associated with the floating gallbladder. Gross classified gallbladder torsion into two types: type I is associated with local attachment between the gallbladder and the liver, while type II is complete floating gallbladder . Type I gallbladder torsion can present radiological findings such as central dislocation of the gallbladder fundus and expansion and tapering of the cystic duct on the right side of the common bile duct, which are similar to the radiological findings of our case.
Our previous report demonstrated that the preoperative detection of LSG is important for avoiding biliary injury in cases of hepatectomy . In our case, the anomaly of the intrahepatic portal system was detected preoperatively, but the diagnosis of LSG was made according to intraoperative findings. In cases of acute cholecystitis, it is important to pay attention to the formation of a right umbilical portion as well as the preoperative location of a round ligament to distinguish between LSG and gallbladder torsion.
Patients with acute cholecystitis are generally good candidates for LC as recommended by the 2018 Tokyo guidelines under strict conditions . Several reports have shown the efficacy of early versus delayed cholecystectomy due to the shorter hospital stays, fewer postoperative complications, and higher LC completion rate [2, 3]. Avoiding biliary duct injury (BDI) is a cause for concern when performing cholecystectomy, and it is important to detect an ectopic biliary system in the emergent setting. Clearly detecting Calot’s triangle is essential for avoiding BDI. Regarding the LSG hypothesis, the cystic duct frequently branches from the left hepatic duct, an anomaly that leads to BDI.
Nastos et al. reviewed 18 previous surgical cases of LSG and reported that it can be safely managed by devising of the port arrangement and the use of intraoperative cholangiography . In the literature, the use of an additional retracting port  and the fundus first approach  have been described. In our case, the distance between the round ligament and the epigastric port was so short that they interfered with each other. It is important to create an adequate workspace between the round ligament and the gallbladder for safe processing of Calot’s triangle. Some reports have stated that manipulation of the falciform ligament is useful . Lifting the falciform and the round ligaments to the body wall using a surgical suture may be an easy approach and enable surgery with a clearer view. In addition, positioning the port more caudally or using an additional port to attract the round ligament would be useful for avoiding obstruction by the round ligament. Here, we performed a conventional American-style LC and attracted the round ligament using the epigastric port. Adopting additional ports or using energy devices may be helpful for ensuring surgical safety and shortening operative time.
In conclusion, LSG is associated with an intrahepatic biliary system anomaly. Here LC was successfully performed. Radiological findings are similar to gallbladder torsion, but identification of the round ligament is useful for the diagnosis of LSG. When LSG is diagnosed, the optimal port site should be determined to ensure safe cholecystectomy.
The authors thank all individuals who contributed to this work.
The authors declare that this work was not supported by any grants or funding
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The data for this case report will not be shared to ensure patient confidentiality.
RH and TA wrote the manuscript. The remaining authors contributed to the data collection, analysis, and interpretation. RH, TA, HA, MN, and TN performed the surgery. All authors conceived of the study, participated in its design and coordination, and helped draft the manuscript. All authors read and approved the final manuscript for publication.
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