Perthes lesion is a medical term used to describe a type of injury to the ankle joint, specifically the talar dome. This injury is often linked to a traumatic event, such as a sprain or fracture, and can cause significant pain and disability. There are several synonyms for Perthes lesion, including intra-articular lesions, osteochondral fractures, and talar dome fractures. These terms are often used interchangeably in medical literature and can be confusing for patients trying to understand their diagnosis. It is important to seek medical attention for any injury to the ankle joint to ensure proper diagnosis and treatment.