Oncologic conditions that simulate common sports injuries.

Primary bone and soft-tissue tumors that mimic common sports injuries are relatively rare and are not often encountered by most orthopaedists. Prompt and accurate diagnosis of these tumors is crucial to maximize the clinical outcome. Many bone and soft-tissue tumors present disproportionately in young and active patients who are often involved in athletic activities. Thus, the clinician may misdiagnose these rare tumors as more common sports injuries. Symptoms that should raise suspicion for a neoplastic process include pain unrelated to activity and a clinical course that does not follow the typically expected recovery for a common sports injury. An awareness of the salient features of several bone and soft-tissue tumors as well as nononcologic processes that may simulate sports injuries can aid clinicians in the prompt diagnosis and clinical decision making of these rare tumors.