What is a common diagnosis for a 14-year-old boy who plays basketball and complains of knee pain and swelling?

Osgood-Schlatter disease is characterized by knee pain and swelling associated with activity, particularly in adolescents who are undergoing growth spurts, such as a 14-year-old boy involved in sports like basketball. This condition results from inflammation of the tibial tuberosity, where the patellar tendon attaches to the tibia, and it is often exacerbated by physical activity.

The repetitive stress on the knee joint during activities that involve running and jumping, common in basketball, can lead to this issue. The typical demographic for Osgood-Schlatter disease is active adolescents, making it a common diagnosis in this scenario. It is most prevalent in boys aged 10 to 15 years, which aligns with the age of the patient in the question.

In contrast, while patellar tendinitis, meniscus tears, and anterior cruciate ligament injuries can also cause knee pain and may occur in sports players, they are less frequently diagnosed in this specific age group and with this presentation. Patellar tendinitis usually presents with pain at the inferior patella, meniscal tears often involve locking or instability, and ACL injuries typically result from sudden stops or changes in direction. Thus, when considering the most likely diagnosis for this active adolescent with knee pain and