What age group is commonly affected by Larsen-Johansson disease?

Larsen-Johansson disease primarily affects adolescents, particularly those in the age range of 11 to 16 years. This condition is characterized by inflammation at the patellar tendon insertion, often due to overuse or repetitive stress on the knee joint from activities such as jumping or running, which are common in this age group.

During the ages of 11 to 16, children experience significant growth spurts and may engage in more vigorous physical activity, potentially leading to the development of such overuse syndromes. The associated growth plate changes during this critical development period can exacerbate the symptoms of Larsen-Johansson disease, making this age group the most commonly affected. Understanding the typical age range is crucial for identifying, diagnosing, and managing this condition effectively in young athletes.