Learning objectives: Educate radiologists about the existence of several rare liver lesions Describe imaging characteristics on different imaging modalities Discuss the diagnostic work up and how to differentiate these lesions from the more commonly seen ones.

Background: Focal liver lesions are frequently encountered in radiology practise and may show characteristics that are specific for a certain diagnosis, such as hemangiomas, FNH, HCC or adenomas. However, when imaging features do not conform to one or more common conditions, they present a diagnostic challenge which could require multi-modality characterization or ultimately pathological assessment. 

Conclusion: Gaining familiarity with unusual cases may aid in earlier recognition, helping to guide further investigations, imaging and treatment.

Rare liver lesions that every radiologist should know about