An abscess of the ligamentum teres hepatis is a very rare cause of acute abdomen and can present a diagnostic dilemma. A 40-year-old diabetic male presented with obstructive jaundice and cholangitis. An ill-defined, sausage-shaped, tender parasagittal supraumbilical mass was palpable on the right side. Murphy's sign was negative. Laboratory investigations revealed polymorphonuclear leukocytosis (total leukocyte count 19,000 mm-3), elevated alkaline phosphatase (400 IU l-1), conjugated hyperbilirubinaemia (16 mg dl-1) and elevated blood glucose (240 mg dl-1). Ultrasonography and MR cholangiopancreatography revealed cholecystolithiasis, obstructive choledocholithiasis, abscess of the ligamentum teres hepatis and left portal thrombosis. Under ultrasound guidance, pus was aspirated from the abscess and the patient was started on broad-spectrum intravenous antibiotics, insulin and low-molecular-weight heparin. He subsequently underwent endoscopic retrograde cholangiopancreatography with sphincterotomy and stone extraction. On the tenth day post admission, he underwent laparoscopic cholecystectomy and excision of the ligament. The patient made an uneventful recovery and was discharged on the seventh post-operative day. On follow-up, the patient remained asymptomatic with normal biochemical parameters. This article highlights the importance of suspecting and identifying an abscess of the ligamentum teres hepatis when a patient with acute abdomen presents with a sausage-shaped right parasagittal mass, especially in the setting of cholangitis, cholecystitis or omphalitis.