OBJECTIVE: The present cross-sectional study aims to identify the most common knee injuries in athletes cared at a Specialized Outpatient Clinics. METHOD: Analysis of patients cared at the Knee Outpatient Clinics of a Sports Trauma Center, divided by gender, age and diagnosed injury. RESULTS: Initially 440 patients were divided into 33 types of sports; after excluding the less statistically significant practices, nine sports remained. The most frequently performed sports were football with almost 50% of total patients presenting anterior cruciate ligament (ACL) injury, and road runs with great frequency of meniscal injury. There was no correlation of the disorder with the type of sports performed but a correlation was found with patient's age/gender. CONCLUSION: The complete ACL rupture was the most common injury found in football, basketball and volleyball players, followed by meniscal injury in street runners. Level of Evidence IV, Study Transversal.

The authors report the case of a patient with synovial osteochondromatosis of the knee, who had previously been a soccer player.

The authors report a case of a patient that was submitted to a surgery of reconstruction of anterior cruciate ligament and collateral medial ligament repair of the left knee that complicated to a compartment syndrome.

The authors report a case of bilateral osteochondritis dissecans in a 17-year-old basketball player who was diagnosed and treated as shown in the literature.

Liposarcoma is an uncommon malignant tumor. It originates in the mesenchymal cells, and is the most common of the soft tissue sarcomas. The authors report a case of a 40 year-old male tennis player with liposarcoma in the posterior right knee and distal thigh region.