Piriformis Syndrome -- Epidemiology of Piriformis Syndrome -- Predisposing Factors -- Causes of Piriformis Syndrome -- Aetiology of Piriformis Syndrome -- Pathophysiology -- Specific tests for the Piriformis Sydrome -- Differential Diagnosis -- Conservative Treatment -- Piriformis Trigger Point Injections -- Radiology to convert CT, MRI and Ultrasound -- NCV studies and EMG studies -- Conservative Treatment -- Surgical Treatment of Piriformis Syndrome -- Minimally Invasive Surgical Approach.