Doctors diagnose retrolisthesis by a physical examination and neurological evaluation that includes details about the patient’s medical history and symptoms. Afterwards, a standing X-ray imaging of the spine ( anterior, posterior, lateral) helps doctors check and measure a displacement. When the displacement is more than 2 millimetres, the doctor can diagnose people with retrolisthesis (e.g., Grade 1). Depending on the results of the neurological exam and review of symptoms, the doctor can ask for additional imaging tests, including a CT Scan or MRI scan.