A contrecoup injury of the knee is a bone contusion of the posterior lip of the medial tibial plateau. It occurs during knee reduction after a pivot shift injury and is highly associated to ACL tear 1, and peripheral tear or meniscocapsular separation of the medial meniscus posterior horn 2.
Occasionally, another bone contusion is seen on the medial margin of the medial femoral condyle, also resultant from knee reduction after the pivot shift injury.
- 1. Cothran RL, Major NM, Helms CA et-al. MR imaging of meniscal contusion in the knee. AJR Am J Roentgenol. 2001;177 (5): 1189-92. AJR Am J Roentgenol (full text) - Pubmed citation
- 2. Kaplan PA, Gehl RH, Dussault RG, Anderson MW, Diduch DR. Bone contusion of the posterior lip of the medial tibial plateau (contrecoup injury) and associated internal derangements of the knee at MR imaging. Radiology 1999; 211:747–753