This case study is explaining and discussing the sign of Beaver tail liver aiming to make it clear for every radiologist to avoid missing it. Abdominal pain is a common medical presentation. Abdominal ultrasound and/or CT are the first imaging modalities in such like cases. Beaver tail liver is a misleading anatomical finding that can be misinterpreted in imaging reports, especially abdominal ultrasound and can lead to unindicted surgical exploration of the case.