Clinical: 31 year old male status post twisting injury.
Dx:
1. Acute full-thickness ACL tear.
2. Acute full-thickness tear/avulsion of the distal MCL with 12 mm of proximal retraction. The retracted ligament stump is located superficial/proximal to the pes anserinus tendons; a type of MCL injury that may require surgical intervention (MCL Stener-type lesion).
3. Moderate sprain of the fibular collateral ligament and severe sprain with partial tearing of the posterolateral capsule. There is also a tear of the popliteofibular ligament and a strain (without tear) of the popliteus.
4. Acute bone bruise along the posterior aspects of the lateral tibial plateau with adjacent incomplete chondral delamination.
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References:
1. Marchant, Jr. MH, Tibor LM, Kekiya JK, Hardaker, Jr. WT, Garrett, Jr. WE, Taylor DC. Am J Sports Med: May 2011 – vol. 39, no. 5, pp. 1102-1113.
2. Corten K, Hoser C, Fink C, Bellemans J. Clin Orthop Relat Res: Jan. 2009 – vol. 468, iss. 1, pp. 289-293.