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The Posterolateral Corner of the Knee

¹ All authors: Department of Radiology, Duke University Medical Center, Erwin Rd., Box 3808, Durham, NC 27710.

View larger version (145K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 1 —Normal fibular collateral ligament in 21-year-old woman. Sagittal fat-suppressed fast spin-echo T2-weighted image (TR/TE, 4,000/49) shows normal appearance of fibular collateral ligament (arrow).

View larger version (151K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 2A —Normal fibular collateral ligament in 21-year-old woman. Consecutive coronal fat-suppressed fast spin-echo T2-weighted images (TR/TE, 4,000/49) show normal appearance of fibular collateral ligament (arrows).

View larger version (154K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 2B —Normal fibular collateral ligament in 21-year-old woman. Consecutive coronal fat-suppressed fast spin-echo T2-weighted images (TR/TE, 4,000/49) show normal appearance of fibular collateral ligament (arrows).

View larger version (154K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 2C —Normal fibular collateral ligament in 21-year-old woman. Consecutive coronal fat-suppressed fast spin-echo T2-weighted images (TR/TE, 4,000/49) show normal appearance of fibular collateral ligament (arrows).

View larger version (158K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 3A —Normal fibular collateral ligament in 21-year-old woman. Consecutive axial fat-suppressed fast spin-echo T2-weighted images (TR/TE, 4,000/49) show normal appearance of fibular collateral ligament (white arrows, A and B). Distally, fibular collateral ligament often joins with biceps femoris tendon (black arrows, A and B) to form conjoined structure that inserts on lateral aspect of fibular head (white arrows, C and D).

View larger version (157K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 3B —Normal fibular collateral ligament in 21-year-old woman. Consecutive axial fat-suppressed fast spin-echo T2-weighted images (TR/TE, 4,000/49) show normal appearance of fibular collateral ligament (white arrows, A and B). Distally, fibular collateral ligament often joins with biceps femoris tendon (black arrows, A and B) to form conjoined structure that inserts on lateral aspect of fibular head (white arrows, C and D).

View larger version (156K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 3C —Normal fibular collateral ligament in 21-year-old woman. Consecutive axial fat-suppressed fast spin-echo T2-weighted images (TR/TE, 4,000/49) show normal appearance of fibular collateral ligament (white arrows, A and B). Distally, fibular collateral ligament often joins with biceps femoris tendon (black arrows, A and B) to form conjoined structure that inserts on lateral aspect of fibular head (white arrows, C and D).

View larger version (153K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 3D —Normal fibular collateral ligament in 21-year-old woman. Consecutive axial fat-suppressed fast spin-echo T2-weighted images (TR/TE, 4,000/49) show normal appearance of fibular collateral ligament (white arrows, A and B). Distally, fibular collateral ligament often joins with biceps femoris tendon (black arrows, A and B) to form conjoined structure that inserts on lateral aspect of fibular head (white arrows, C and D).

View larger version (185K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 4 —Proximal tear of fibular collateral ligament in 20-year-old man. Coronal fat-suppressed fast spin-echo T2-weighted image (TR/TE, 3,217/73) depicts proximal avulsion of fibular collateral ligament (arrows) from its femoral origin.

View larger version (167K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 5 —Normal biceps femoris tendon insertion in 19-year-old woman. Coronal fat-suppressed fast spin-echo T2-weighted image (TR/TE, 3,500/50) shows normal appearance of distal biceps femoris tendon (arrows).

View larger version (191K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 6 —Biceps femoris tendon with tear at insertion in 30-year-old man. Coronal fat-suppressed T2-weighted image (TR/TE, 4,000/70) shows avulsion of distal biceps femoris tendon from fibular head (arrow).

View larger version (156K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 7A —Normal popliteus tendon and muscle in 15-year-old girl. Axial fat-suppressed fast spin-echo T2-weighted images (TR/TE, 3,750/46) show normal appearance of popliteus tendon (arrows) and muscle belly (black arrowheads, D) and relationship between popliteus tendon and fibular collateral ligament (white arrowheads, A and B).

View larger version (155K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 7B —Normal popliteus tendon and muscle in 15-year-old girl. Axial fat-suppressed fast spin-echo T2-weighted images (TR/TE, 3,750/46) show normal appearance of popliteus tendon (arrows) and muscle belly (black arrowheads, D) and relationship between popliteus tendon and fibular collateral ligament (white arrowheads, A and B).

View larger version (150K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 7C —Normal popliteus tendon and muscle in 15-year-old girl. Axial fat-suppressed fast spin-echo T2-weighted images (TR/TE, 3,750/46) show normal appearance of popliteus tendon (arrows) and muscle belly (black arrowheads, D) and relationship between popliteus tendon and fibular collateral ligament (white arrowheads, A and B).

View larger version (146K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 7D —Normal popliteus tendon and muscle in 15-year-old girl. Axial fat-suppressed fast spin-echo T2-weighted images (TR/TE, 3,750/46) show normal appearance of popliteus tendon (arrows) and muscle belly (black arrowheads, D) and relationship between popliteus tendon and fibular collateral ligament (white arrowheads, A and B).

View larger version (158K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 8A —Normal popliteus tendon and muscle in 15-year-old girl. Coronal fast spin-echo T2-weighted images (TR/TE, 3,950/49) depict normal popliteus tendon (arrows) and popliteus muscle belly (arrowheads, D).

View larger version (159K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 8B —Normal popliteus tendon and muscle in 15-year-old girl. Coronal fast spin-echo T2-weighted images (TR/TE, 3,950/49) depict normal popliteus tendon (arrows) and popliteus muscle belly (arrowheads, D).

View larger version (164K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 8C —Normal popliteus tendon and muscle in 15-year-old girl. Coronal fast spin-echo T2-weighted images (TR/TE, 3,950/49) depict normal popliteus tendon (arrows) and popliteus muscle belly (arrowheads, D).

View larger version (158K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 8D —Normal popliteus tendon and muscle in 15-year-old girl. Coronal fast spin-echo T2-weighted images (TR/TE, 3,950/49) depict normal popliteus tendon (arrows) and popliteus muscle belly (arrowheads, D).

View larger version (167K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 9A —Popliteus injury in 51-year-old man. Axial fat-suppressed fast spin-echo T2-weighted image (TR/TE, 4,000/69) shows fluid signal adjacent to popliteus musculotendinous junction (black arrow), consistent with partial tear, and increased signal intensity, consistent with injury, within visualized popliteus muscle belly (white arrow).

View larger version (198K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 9B —Popliteus injury in 51-year-old man. Sagittal fat-suppressed fast spin-echo T2-weighted image (4,000/50) shows fluid signal extending along margins of popliteus muscle belly (arrows), consistent with partial tear.

View larger version (192K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 10 —Intact popliteofibular ligament in 75-year-old woman. Coronal fat-suppressed fast spin-echo T2-weighted image (TR/TE, 4,117/69) shows prominent intact popliteofibular ligament (arrow) extending from popliteus tendon to fibular styloid process.

View larger version (178K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 11 —Intact popliteofibular ligament in 60-year-old woman. Sagittal fat-suppressed fast spin-echo T2-weighted image (TR/TE, 3,900/50) depicts popliteofibular ligament (arrow) inserting on fibular styloid process (arrowhead).

View larger version (172K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 12A —Normal popliteofibular ligament in 60-year-old woman. Axial fat-suppressed fast spin-echo T2-weighted images (TR/TE, 4,350/50) show intact popliteofibular ligament (white arrows, B–D) and its relationship to popliteus tendon (white arrowheads), fibular collateral ligament (black arrows, A and B), and biceps femoris tendon (black arrowheads).

View larger version (166K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 12B —Normal popliteofibular ligament in 60-year-old woman. Axial fat-suppressed fast spin-echo T2-weighted images (TR/TE, 4,350/50) show intact popliteofibular ligament (white arrows, B–D) and its relationship to popliteus tendon (white arrowheads), fibular collateral ligament (black arrows, A and B), and biceps femoris tendon (black arrowheads).

View larger version (155K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 12C —Normal popliteofibular ligament in 60-year-old woman. Axial fat-suppressed fast spin-echo T2-weighted images (TR/TE, 4,350/50) show intact popliteofibular ligament (white arrows, B–D) and its relationship to popliteus tendon (white arrowheads), fibular collateral ligament (black arrows, A and B), and biceps femoris tendon (black arrowheads).

View larger version (156K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 12D —Normal popliteofibular ligament in 60-year-old woman. Axial fat-suppressed fast spin-echo T2-weighted images (TR/TE, 4,350/50) show intact popliteofibular ligament (white arrows, B–D) and its relationship to popliteus tendon (white arrowheads), fibular collateral ligament (black arrows, A and B), and biceps femoris tendon (black arrowheads).

View larger version (164K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 13 —Torn popliteofibular ligament in 27-year-old man. Coronal fat-suppressed fast spin-echo T2-weighted image (TR/TE, 3,500/65) shows avulsion of distal popliteofibular ligament (arrow) from fibular styloid process (arrowhead).

View larger version (187K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 14 —Normal fabellofibular ligament in 43-year-old woman. Coronal fat-suppressed fast spin-echo T2-weighted image (TR/TE, 3,450/69) depicts normal fabellofibular ligament (arrow), which extends from fabella (arrowhead) to fibular styloid process.

View larger version (159K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 15 —Intact arcuate ligament in 20-year-old man. Axial fat-suppressed fast spin-echo T2-weighted image (TR/TE, 4,450/74) at level of joint line shows arcuate ligament (arrows) is intact.

View larger version (178K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 16 —Torn arcuate ligament in 53-year-old man. Axial fat-suppressed fast spin-echo T2-weighted image (TR/TE, 4,000/49) shows tear of posterolateral joint capsule (arrowheads) at level of joint, which is consistent with arcuate ligament tear.

View larger version (141K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 17 —Arcuate fracture in 55-year-old man. Frontal radiograph shows knee with fracture of fibular styloid process (arrow).

View larger version (169K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 18 —Arcuate fracture in 55-year-old man. Sagittal fat-suppressed fast spin-echo T2-weighted image (TR/TE, 4,000/75) depicts avulsion fracture of fibular styloid process (arrow), which is also called "arcuate" fracture.

View larger version (188K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 19 —Fibular head edema in 34-year-old woman. Coronal fat-suppressed fast spin-echo T2-weighted image (TR/TE, 4,000/70) shows edema in fibular head (arrowheads). There is increased signal, consistent with injury, in distal biceps femoris tendon (arrow).

View larger version (183K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 20 —Medial femoral condyle contusion in 48-year-old man. Sagittal fat-suppressed fast spin-echo T2-weighted image (TR/TE, 3,750/69) shows increased signal intensity within bone marrow of anterior aspect of medial femoral condyle (arrowheads), consistent with hyperextension varus contusion.

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