Seeing Double: A Case of ACL Tears in Monozygotic Twin Female Athletes Within 48 Hours

: Anterior cruciate ligament (ACL) injuries are a serious issue for young athletes. These injuries are devastating and costly, leading to significant time away from sports, and substantial financial cost. A case is presented in which monozygotic twin sisters sustained ACL injuries within 48 hours of one another. Limited research is available studying twins with ACL tears and the risk factors associated with them. This is the first reported case of monozygotic sisters that are high-level athletes with ACL tears in such close proximity to one another. Enhanced knowledge of genetic contribution to ACL injuries is important to better understand predisposing factors and to develop preventative approaches. More research is needed to support a distinct association between ACL rupture and genetic variants.