This document contains a summary of various musculo-skeletal cases involving different joints such as the ankle, shoulder, knee, hip, elbow, and wrist. For each case, it provides an overview of imaging findings and diagnoses, including conditions such as osteochondritis dissecans, anterior talofibular ligament injury, adhesive capsulitis, anterior cruciate ligament tear, avascular necrosis of the femoral head, tennis elbow, and carpal tunnel syndrome. A variety of imaging modalities like MRI and x-rays are discussed.

1. Musculo-skeletal Quiz Cases.
Dr/ ABD ALLAH NAZEER. MD.

2. Ankle Joint.

4. Osteochondritis Dissecans.

6. Anterior inferior tibiofibular ligament and a non-displaced spiral fracture of the distal fibular shaft.

8. Anterior talofibular ligament injury.

10. Chronic tear of the anterior talofibular ligament.

12. Sinus tarsi syndrome.

14. Os Trigonum Syndrome.

16. Pigmented Villonodular Synovitis.

18. Hemophilic arthropathy, there is marked synovial proliferation at the ankle and posterior subtalar joints which
appears of low signal on all sequences. There is some contrast enhancement consistent with synovitis. There is
marrow edema within the talus and calcaneum and degenerative disease of the posterior subtalr joint.

20. Synovial
Osteochondromatosis.

21. Shoulder joint.

23. Synovial Osteochondromatosis

25. Findings reveal the
classic
degenerative
process that begins
with acromio -
clavicular arthritis,
complete tear of
the supra-
spinatous with
retracted tendon,
subacromial and
subdeltoid bursitis,
and also, infra-
spinatous tear

27. Features of internal impingement of the shoulder with humeral head cysts underlying infraspinatus,
superior fiber infraspinatus and posterior fiber supraspinatus tendinosis and posterosuperior labral
fraying. Subacromial bursal thickening and increased fluid indicating co-existing subacromial bursitis.

29. Adhesive capsulitis. There is thickening of the axillary pouch, which is only mildly hyperintense (arrow). b Axial
proton density FSE image of the same patient demonstrates moderate scarring of the rotator interval (arrow).

31. Adhesive Capsulitis.

33. SS Calcification, Bursal Extrusion MR .

35. Infraspinatus tendon calcification.

38. Full-thickness tear of the supraspinatus tendon.

41. Knee Joint.

43. Anterior Cruciate
Ligament tear /
avulsion with
buckling of the
posterior
cruciate
ligament

45. Liposarcoma.

47. Large pre-patellar bursitis.

49. Osteochondritis Dissecans.

51. Sagittal images (A,B,C) and coronal image (D) of T2 weighted MRI. A horizontal meniscal tear is identified inside the meniscus in Figure 1-
A (a white arrow). A multilobulated cyst is located just behind the medial meniscus and the PCL (B, C). The cyst is in communication with
the meniscal tear on Figure 1-D (white arrows). Note that the horizontal meniscal tear has not extended to the tibial or femoral surface.

53. ACL Mucoid
degeneration with cyst-
formation (intraosseus
ganglion). Mucoid
material is squeezed
from between the ACL-
fibers into the bone. At
arthroscopy ACL and
bone looked normal.

55. ACL ganglion cyst

57. The double PCL sign appears on sagittal MRI images of the
knee when a bucket-handle tear of the medial meniscus.

59. ACL tear, anterior
drawer sign with
intra-articular loose
body, and the
world's worst deep
lateral femoral
sulcus sign.

61. Meniscal Root Tear.

63. Meniscal Root Tears

65. Synovial Hemangioma:

66. Hip Joint.

68. Avascular necrosis of both femoral heads, grade 11 and 111.

70. Avascular necrosis of both femoral heads grade 11.

72. Perthes disease.

74. Perthes disease.

76. Perth's Disease

78. Juvenile Idiopathic Arthritis

80. Transient osteoporosis of the hip.

82. Septic arthritis.

84. Intra-articular Loose body.

86. Slipped capital femoral epiphysis.

88. Coxa vara

90. Cam type femoral acetabular impingement syndrome.

91. Elbow Joint.

93. Bicipito- Radial Bursitis.

95. Tennis elbow.

97. T2-weighted coronal MRI scans showing a complete tear of the LUCL (white arrows) preoperatively
and incomplete ligament healing with mild widening of the radiocapitellar joint space

99. MRI of a severely damaged medial ulnar collateral ligament in a throwing athlete.

101. Triceps tendon tear and olecranon avulsion fractures.

103. Olecranon bursitis.

105. Osteochondritis dissecans of the capitellum.

106. Pigmented villonodular synovitis.

107. Pigmented villonodular synovitis.

108. Wrist Joint.

110. Idiopathic bilateral lunate and triquetrum avascular necrosis

112. Avascular necrosis of the scaphoid.

114. Ulnocarpal abutment. Hamatolunate impaction. Ulnar impingement.

116. Dequervain's tenosynovitis. Intrinsic signal changes and fluid in the sheath of the first extensor
compartment tendons (arrow). (B) Patient with inflammatory arthropathy and tenosynovitis

118. Carpal tunnel syndrome. (A) Sagittal T2-weighted image with fat suppression
reveals thickening of the median nerve proximal to the carpal tunnel (arrow);

120. Ganglion cyst.

122. Compressive ulnar neuropathy. (A) Axial PD-weighted sequence with fat suppression at the level
of the canal of Guyon’s. The ulnar nerve (arrow) has high signal intensity and it is thickened.
There is a ganglion cyst (*) compressing the ulnar nerve against the pisiform. (B) The ganglion
cyst (*) is large and extends distally beyond the ulnar tunnel (hook of the hamate **).

124. Rheumatoid arthritis. Coronal T2-weighted image with fat suppression. Diffuse deep chondral erosions of the
proximal and midcarpal compartments and large joint effusion with synovitis (*) were found during the investigation
of chronic wrist pain in this 35-year-old woman. Erosions are seen in the scaphoid and triquetrum (arrows).

126. Intraosseous ganglion cyst.

128. Rheumatoid arthritis with MR image
demonstrates multiple erosions in the
carpal bones and bases of the metacarpals,
with pannus formation around the distal
ulna and extensive tenosynovitis.

130. Fibrolipomatous hamartoma of the median nerve.

131. Thank You.