Hypertrophic Column of Bertin: a renal tumor mimicker

Background: The hypertrophic column of Bertin is one of the congenital variants of the kidney. It's a rare case and is usually found as an incidental finding from renal ultrasound. Its characteristic of the finding may mimic a solid mass from an Ultrasound (US). Further examination may lead to unnecessary interventional or surgical procedures. Case Presentation: We reported a patient with a suspected left renal mass from the ultrasound finding, and the CT urography with contrast revealed that the lesion is a hypertrophic column Bertin (HCB). Conclusion: It's really important for clinicians and radiologists to know the characteristic findings of Bertin's Hypertrophic column to prevent unnecessary biopsy and surgical procedures.