Posterolateral dislocation of the knee: Recognizing an uncommon entity

Table 1 Characteristics of reported cases of posterolateral dislocation of the knee

Ref.	Patient age and gender	Torn structures (besides medial capsule, retinaculum, vastus medialis, MPFL)	MRI	Doppler	Angiogram/CT angiogram	Attempted closed reduction	Arthroscopic surgery	Interval to open reduction	Open surgery
Current study	48 M	MCL, ACL	No	Yes	No	No	No	4 h	Yes
Nystrom et al[8]	24 M and 31 F	MCL, ACL, PCL	No	No	No	Yes	No	Not mentioned	Yes
Huang et al[1]	61 M	ACL, PCL, MCL (also degenerative arthrosis)	No	No	No	Yes	Yes	> 8 h	Yes
Jeevannavar et al[2]	32 M	MCL, medial retinaculum, partial ACL tear	Yes	Yes	Yes	Yes	No	Not mentioned	Yes
Paulin et al[4]	54 M	ACL, PCL, MCL, LCL	Yes	No	Yes	Yes	No	< 24 h	Yes
Quinlan et al[3]	38 M, 40 F, 49 M, 20 M, 41 F	ACL, PCL, MCL in all patients, additional medial meniscus tear in 1 patient	No	No	No	3 of 5 cases	No	24 h in 4 cases, few days later in 1 case	Yes
Ashkan et al[7]	37 M	ACL, PCL, MCL, LCL, PLC	No	No	No	Yes	No	Following thoracoabdominal surgery	Yes
Urgüden et al[9]	51 M and 53 F	Medial retinaculum, MCL, ACL, PCL	No	Yes in 1 patient	No	Yes	No	4 h in both	Yes

ACL: Anterior cruciate ligament; PCL: Posterior cruciate ligament; MCL: Medial collateral ligament; LCL: Lateral collateral ligament; PLC: Posterolateral corner; MPFL: Medial patellofemoral ligament; M: Male; F: Female; MRI: Magnetic resonance imaging; CT: Computed tomography.