The study aims to show the result of successful treatment of giant-cell tumor of the epimetaphysis of the right femur in a child. Material and methods. The paper presents a rare clinical and diagnostic case of giant-cell tumor of the epimetaphysis in a 5-year-old girl and its results of diagnosis and surgical treatment. Results. The patient first came to see a Trauma Surgeon and a Pediatric Surgeon for pain in the right knee joint 2 weeks after the injury. As a result of the diagnostic search and morphological examination of the tumor, a giant-cell tumor of the epimetaphysis of the right femur and a fracture of the femoral neck were diagnosed. The resection of the upper third of the femur, osteosynthesis, followed by reduction of the fracture were performed. Oncological alertness should always be present regarding prolonged bone pain in patients, especially when they occur at night, considering the results of the histologic examination and despite their age.