Distribution of<unk><unk> : The most frequent locations are the large long bones and the pelvis.<unk><unk>  is more common in males (1.6 male:1 female) and usually presents in childhood or early adulthood, with a peak between 10 and 20 years of age. It can occur anywhere in the body but most commonly in the pelvis and proximal long tubular bones,<unk> pecially around the growth plates. The diaphyses of the femur are the most common sites, followed by the tibia and the humerus. Thirty percent are overtly metastatic at presentation, while 10–15% of people present with a pathologic fracture at the time of diagnosis. People usually experience extreme bone pain. Rarely, it can develop in the vagina. Signs and symptoms include intermittent fevers, anemia, leukocytosis, increased sedimentation rate, and other symptoms of inflammatory systemic illness. According to the Bone Cancer Research Trust (BCRT), the most common symptoms are localized pain, swelling, and sporadic bone pain with variable intensity. The swelling is most likely to be visible if the<unk>  is located on a bone near the surface of the body, but when it occurs in other places deeper in the body, like on the pelvis, it may not be visible.
Ewing's sarcoma
Osteosarcoma
Osteoblastoma
Eosinophilic granuloma
Enchondroma
Neuroblastoma
Synovial sarcoma
Osteomyelitis