Bones
ACCESSORY OSSICLES
Figure 63-1. Accessory ossicles of the hand. The shaded circles indicate locations of sesamoid bones.
1. Epitrapezium
2. Calcification (bursa, flexor carpi radialis)
3. Paratrapezium (petrapezium)
4. Trapezium secundarium
5. Trapezoides secundarium
6. Os styloideum
7. Ossiculum Gruberi
8. Capitatum secundarium
9. Os hamuli proprium
10. Os vesalianum
11. Os ulnare externum (calcified bursa or tendon)
12. Os radiale externum
13. Fissure of traumatic origin
14. Persisting ossification center of the radial styloid process
15. Intercalary bone between the navicular and the radius (paranavicular)
16. Os carpi centrale
17. Hypolunatum
18. Epilunatum
19. Accessory bone between the lunate and the triangular bone
20. Epipyramis
21. So-called “os triangulare”
22. Persisting center of the ulnar styloid
23. Small ossicle at the level of the radioulnar joint
24. None
25. Avulsion from the triangular bone; no accessory ossicle
26. Tendon or bursal calcification
27. Calcification of the pisiform
(Keats TE. Atlas of normal Roentgen variants that may Simulate disease, 5th ed. St. Louis: Mosby-Year Book, 1992:420-430. Fig. 6-139, p. 430). |
Figure 63-2. Accessory ossicles of the ankle.
1. Accompanying shadow on the internal malleolus (patella malleoli)
2. Intercalary bone (or sesamoid) between the internal malleolus and the talus
3. Os subtibiale
4. Talus accessorius
5. Os sustentaculi
6. Os tibiale externum
7. Os retinaculi
8. Intercalary bone (or sesamoid) between the external malleolus and the talus
9. Os subfibulare
10. Talus secundarius
11. Os trochleare calcanei
12. Os trigonum
Related posts: Stay updated, free articles. Join our Telegram channel
Full access? Get Clinical Tree
Get Clinical Tree app for offline access
|
