{Reference Type}: Case Reports {Title}: Proximal femur diaphysis osteoid osteoma mimicking lumbar radiculopathy. {Author}: Saçaklıdır R;Huseynli L;Şencan S;Gündüz OH; {Journal}: Turk J Phys Med Rehabil {Volume}: 69 {Issue}: 3 {Year}: 2023 Sep {Factor}: 1.455 {DOI}: 10.5606/tftrd.2023.10653 {Abstract}: Osteoid osteoma is a benign bone tumor that commonly arises from the metaphyseal and diaphyseal regions of long bones. Pain is often the first symptom, and it can mimic many diseases. Herein, we report a 36-year-old male patient who presented with complaints of lower back pain radiating to the right extremity for a year. In the patient's history, physical therapy, platelet-rich plasma, pregabalin, and duloxetine were used, with the only benefit from indomethacin. An X-ray of the femur was requested, and the diagnosis of osteoid osteoma was confirmed by magnetic resonance imaging. Osteoid osteoma should be kept in mind as a differential diagnosis of persistent pain despite treatment.