Table 2: Traumatic meniscus tears vs. Degenerative meniscus tears.

Traumatic meniscus tears	Degenerative meniscus tears
Age <35	Age > 35
Obvious trauma-induced onset of symptoms	No history of trauma (sudden onset of knee pain resulting from a single physical impact event)
Decreased range of motion of the knee	Knee pain for 2/3 months or longer
Locking of the knee	Degenerative meniscus tear characteristic on MRI scan (defined as intrameniscus linear MRI signal penetrating one or both surfaces of the meniscus)