Accessory lobe of liver is an uncommon condition and ‘symptomatic heptocellular adenoma in an accessory lobe of liver’ is probably the first case. A 53 year old female patient presented with acute pain abdomen with history of recurrent pain abdomen since many years. USG & plain CT scan abdomen reported as right anterior abdomen mesentric adenoma. Intraoperatively surgeon found a mesentric mass (measuring 11x9x8 cm) with attached pedicle to liver inferiorly. On histopathological examination it is surprisingly found to be hepatocellular adenoma.