Study index: 96-4 Vendor Picker Modality MR Examination MRI: Knee History 16-year-old with right knee pain after an injury playing basketball. Findings The bony structures are intact and normally aligned. There is bruising of the medial femoral condyle with some intrasubstance injury to the medial collateral ligament. The lateral collateral ligament in intact. The anterior cruciate ligament is irregular and slightly lax suggesting a partial tear. It does not appear to be completely torn. The posterior cruciate ligament is intact. The suprapatellar tendons are normal. There is a tear of the posterior limb of the medial meniscus which communicates with the superior articular surface. The lateral meniscus is intact. There is a Baker's cyst and moderate joint effusion. Internal derangement of the right knee with marked injury and with partial tear of the ACL; there is a tear of the posterior limb of the medial meniscus. There is a Baker's Cyst and joint effusion and intrasubstance injury to the medial collateral ligament.