Hip arthrosis and greater trochanteric pain syndrome are two common sources of hip pain. In this retrospective German series, a whopping 698 patients (811 hips) were treated with low dose RT for either hip arthrosis (32%) or GTPS (68%). At least two prior conservative treatments were required in both groups, and patients with hip arthrosis had to have at least Kellgren-Lawrence grade 1 changes on imaging (doubtful joint space narrowing and possible osteophyte lipping). The CTV for hip arthrosis included the entire joint, and the femoral neck to just above the intertrochanteric crest. The CTV for GTPS included the gluteal muscle insertion at the greater trochanter down to the lesser trochanter at the lateral femoral neck. Patients typically received a total of 6 fractions given twice per week at a dose of 0.5 to 3 Gy per fraction. The response rate was 58% for hip arthrosis and 64% for GTPS. Older age and higher BMI were negatively associated with response. Also of interest, an initial increase in pain after starting RT was associated with worse response. | Klepzig, Int J Radiat Oncol Biol Phys 2025
