Enormous ectopic liver tissue at the gastrohepatic ligament: a rare entity at Muhimbili National Hospital, Tanzania

Ectopic liver tissue (ELT) is a developmental abnormality in which liver tissue develops at an extrahepatic site without connection to the true liver. It is a rare entity with an incidence of 0.24–0.56% according to data described in laparoscopic or autopsy studies. The detailed mechanism behind the development of ELT is poorly understood. ELT predominantly has an asymptomatic nature, even by means of radiological studies the diagnosis of ELT without surgery or autopsy is difficult. ELT has been reported mostly to be found frequently on the gallbladder and rarely on the gastrohepatic ligament. ELT has increased the potential risk of HCC which makes the resection crucial. Due to its variations anatomically, ELT recognition should gain clinical importance and surgeons need to be aware of these possible disparities. Case presentation. We present a 59-year-old female from Western Tanzania was presented to us with 2-month history of painless upper abdominal swelling. An abdominal CT scan was performed, and it revealed a large mass located at the gastrohepatic region with blood supply mainly from the left hepatic artery and omentum. Technically difficult excision of 17 × 12 cm tumor at gastrohepatic ligament was performed, with uneventful recovery. Post-operative histology results revealed capsulated hepatic parenchyma without the biliary components and limited sinusoids with tissue degeneration. To date, no complications happened during follow-up for one year. ELT is a rare entity with a predominantly asymptomatic nature. Preoperatively diagnosis is difficult even with images. It has anatomical variation and is hardly found along the gastrohepatic ligament. ELT has increased the potential risk of HCC which makes the resection crucial. Increased awareness of this congenital anomaly may result in increased detection rates.