Name : Morteza
Family :Sanei Taheri
Resident : Morteza Babaii
Gender : Male
Age : 23
Young athlete with rotational leg injury coming with swelling and pain of knee joint.
Imaging Procedures and Findings
PCL is not identified properly, instead intermediate signal throughout of it is noted representing edema and hemorrhage . Also mild joint effusion is seen.
Tears of the PCL are uncommon. About 50 ACL tears are imaged for each PCL tear. Most are incomplete and occur in the midportion of the ligament. Others involve the femoral and tibial attachments, where avulsion fracture may be present. In a minority of patients, the PCL injury is isolated, whereas in most patients, it is associated with other abnormalities. Injury to the PCL can be reliably identified on sagittal MRI on the basis of changes in signal intensity and morphology. Edema and hemorrhage cause acute intrasubstance tears to produce zones of increased signal intensity. With disruption or detachment of the ligament, similar signal changes are seen, and the ligament itself may appear redundant. Trauma to the PCL can be seen on axial and coronal images as well . Proximal or distal avulsion injuries will be evident with the presence of high-signal intensity ligamentous hemorrhage, subchondral marrow edema, intra-articular bone fragment with marrow signal intensity, and intra-articular hemorrhage in the intervening space.
Torn posterior cruciate ligament
CT and MR imaging of the whole body / [edited by] John R. Haaga ... jet al.].-5th ed