Test yourself: Recurrent right groin lump.

In summary, imaging diagnosis of femoral hernia can be potentially difficult and radiologists must be cognizant of this possible differential diagnosis whenever a cystic lesion is encountered at its characteristic location. Thus, femoral hernia should be considered in the differential diagnoses whenever a cystic groin mass is encountered at or near the femoral ring or canal, inferior to the inguinal ligament between the pubic tubercle and the femoral vein. While the diagnosis of larger femoral hernias containing bowel or peritoneal fat is relatively straightforward, early femoral hernias may contain only peritoneal fluid and can be difficult to distinguish from other cystic lesions on imaging. [Extracted from the article]