The finding of a liver lesion on incidental imaging is one of the most anxiety-provoking results in clinical practice, and I want to be direct: the great majority of liver lesions found incidentally are benign and require no surgical intervention. A simple hepatic cyst, which appears as a smooth, thin-walled, fluid-filled structure on ultrasound or CT, requires no treatment in the vast majority of cases and no follow-up imaging beyond confirming the diagnosis. A haemangioma, the most common benign liver tumour, is a vascular lesion that is almost always managed conservatively regardless of size, because the natural history is stable and the risk of intervention outweighs any benefit. The lesions that require more careful specialist evaluation are those that cannot be confidently classified as benign on initial imaging. Focal nodular hyperplasia typically has a characteristic imaging appearance but may require contrast-enhanced MRI for confident diagnosis. Hepatocellular adenoma, particularly in women of reproductive age using oral contraceptives, carries a risk of haemorrhage and a small malignant transformation risk that influences management. Hepatocellular carcinoma, the most common primary liver cancer, typically arises in a background of chronic liver disease or cirrhosis and requires multidisciplinary assessment for resection, ablation, or transplantation candidacy. Colorectal liver metastases can in selected patients be resected with curative intent. "The first step after an incidental liver finding is specialist hepatobiliary assessment, which uses the imaging characteristics, the clinical context, and if necessary additional imaging or biopsy to determine whether the lesion is benign, requires monitoring, or warrants surgical treatment."
Written by Dr. Lokesh H M, MBBS, MS, MCh Surgical Gastroenterology, Fellowship Pancreato-Biliary Surgery (SGPGIMS Lucknow), FMAS, Senior Consultant Surgical Gastroenterologist, Narayana Multispeciality Hospital and RK Speciality Clinic, Mysuru. Phone: +91 89719 08095.
