Presentation
Patient came with medial sided knee pain after recent trauma. Sustainable normal range of movement with no swelling. On clinical exam: no knee instability and normal range of movement.
Patient Data
The ACL is not visualized with no peri-cruciate fat pad edema.
Case Discussion
Congenital absence of the anterior cruciate ligament is rare with a prevalence of 0.017 per 1000 live births 1.
The intercondylar fossa appears relatively empty (except the PCL is seen which appears hypoplastic and buckled) with no knee joint effusion or peri-cruciate fat pad edema, as well as the symptoms and clinical exam, also support the diagnosis.
Stage IIA osteochondral injury of the medial femoral condyle.
Tear in the posterior horn of the medial meniscus.
The lateral meniscal tear is commonly associated with an acute ACL, while medial meniscal tear associated with a chronic ACL injury (in above case no previous history of old trauma or chronic ACL tear).