Passive Posterior Tibial Subluxation on Routine Knee MRI as a Secondary Sign of PCL Tear

Table 2

Imaging findings in PCL injury.

Age	Sex	Timing	Etiology	Initial MRI evaluation	Arthroscopic findings	Medial compartment translation	Lateral compartment translation
20	F	Acute	Motor vehicle accident	Partial tear	Complete PCL tear of AL bundle; partial of PM bundle; grade 1 medial femoral cartilage injury	−3.1	−1.6
46	M	Acute	Fall	High-grade partial tear	Intrasubstance tear of AL bundle; intact PM bundle	2.5	0
53	M	Acute	Motor vehicle accident	Complete tear at tibial	Complete tear of the AL bundle	8	6.3
17	F	Chronic	Athletic injury	High-grade partial tear	Complete PCL tear	1	−4.9
21	M	Chronic	Athletic injury	Complete tear	Complete PCL tear with no residual fibers	4.2	2.1
22	M	Chronic	Athletic injury	Complete tear	Grades 2-3 PCL tear; grade 3 posterolateral corner rotatory laxity	3.7	−1.8
25	F	Chronic	Motor vehicle accident	Complete tear	Complete tear of PM bundle, partial tear of AL bundle; grade 2 chondrosis of inferior pole of patella	0	0
28	F	Chronic	Motor vehicle accident	High-grade partial tear	Near complete tear of AL with partial tear of PM bundle; grade 2 trochlear chondral injury	3.3	−5.4
30	M	Chronic	Motor vehicle accident	Partial tear	Intrasubstance PCL stretch injury; medial tibial plateau grade 1 softening; grade 2 medial collateral ligament injury	5.7	1.5
42	M	Chronic	Motor vehicle accident	High-grade partial tear	Grade 3 PCL tear; grade 3 posterolateral corner injury; medial meniscal fraying; grade 2 patellar chondral injury	5.3	−2.5
20	M	Subacute	Motor vehicle accident	Complete tear at tibial	Complete PCL tear of both AL and PM bundles	1.9	0

AL: anterolateral.
PM: posteromedial.