Focal nodular hyperplasia of the liver is a benign vascular neoplasm that can occur in men and women of any age, but is most often found in young women [1]. Focal nodular hyperplasia is typically an incidental discovery during radiologic imaging performed for other reasons. Although considered a rare neoplasm, focal nodular hyperplasia is the second most common benign liver tumor after hemangioma [2] and has a reported frequency of 3% in adults [3]. With the increasing use and improvement of fast scanning techniques, focal nodular hyperplasia is being detected more often. These lesions, particularly in patients with a known malignancy, pose a diagnostic dilemma. Familiarity with the spectrum of CT findings of focal nodular hyperplasia is important so that accurate and efficient diagnoses are made. Such familiarity may help to avoid unnecessary testing, expense, concern, biopsy, or surgery.