This document provides descriptions and images of avulsion injuries at various anatomical locations in the body. Avulsion injuries refer to the tearing away of a tendon, ligament, or muscle from the bone. The document lists 17 figures showing examples of avulsion injuries at locations such as the ischial tuberosity, anterior superior iliac spine, anterior inferior iliac spine, symphysis pubis, lesser trochanter, greater trochanter, fibular head, tibial eminence, posterior cruciate ligament, tibial tuberosity, inferior pole of the patella, calcaneal tuberosity, anterior and posterior capsule of the ankle joint, greater and lesser tuberosity of the

1. 34Avulsion Injuries*

2. CLINICAL IMAGAGING
AN ATLAS OF DIFFERENTIAL DAIGNOSIS
EISENBERG
DR. Muhammad Bin Zulfiqar
PGR-FCPS III SIMS/SHL

3. • Fig B 34-1 Ischial tuberosity. Bilateral chronic
avulsions. Note the protuberant bone (closed
arrows) and a large, smooth fragment (open
arrows).43

4. • Fig B 34-2 Anterior superior iliac spine
(arrowhead).44

5. • Fig B 34-3 Anterior inferior iliac spine
(arrowhead).44

6. • Fig B 34-4 Symphysis pubis (arrows).43

7. • Fig B 34-5 Lesser trochanter (solid arrow). A
lytic defect representing metastatic cancer is
seen at the femur attachment site (open
arrow).43

8. • Fig B 34-6 Greater trochanter (arrows). (A)
Plain film. (B) MRI.43

9. • Fig B 34-7 Segond fracture (arrow).44

10. • Fig B 34-8 Fibular head (arrow).43

11. • Fig B 34-9 Tibial eminence (arrow).43

12. • Fig B 34-10 Posterior cruciate ligament. (A)
Axial CT shows minimal displacement of the
avulsed fragment (arrows). (B) Sagittal proton-
density-weighted MR image shows
displacement of an avulsed fragment
(arrow).43

13. • Fig B 34-11 Tibial tuberosity. There is
displacement of the proximal base of the
epiphysis and extension into the joint (arrows).43

14. • Fig B 34-12 Inferior pole of the patella (white
arrowhead). The black arrowhead points to the
site of the avulsion from the abnormally high
patella.44

15. • Fig B 34-13 Calcaneal insufficiency (arrow).43

16. • Fig B 34-14 Posterior capsule. Curvilinear
calcification adjacent to the posterior tibial
margin (arrow).43

17. Fig B 34-15 Anterior capsule. Protuberance of the anterior talus
(arrow) where the joint capsule is inserted, indicating a chronic
avulsion.43

18. • Fig B 34-16 Greater tuberosity. (A) Frontal
radiograph shows the nondisplaced avulsion
(arrows). (B) Coronal oblique T1-weighted MR
image shows the fracture to greater
advantage (arrow).43

19. • Fig B 34-17 Lesser tuberosity (arrows).43

20. • Fig B 34-18 Medial epicondyle (arrowheads).44