| Diaphysis | |
|---|---|
 A long bone, with the diaphysis labeled at right. | |
| Details | |
| Pronunciation | /daɪˈæfɪsɪs/ dy-AF-iss-iss[1][2] |
| Part of | Long bones |
| Identifiers | |
| MeSH | D018483 |
| TA98 | A02.0.00.017 |
| TA2 | 391 |
| FMA | 24013 |
| Anatomical terminology | |
The diaphysis (pl.: diaphyses) is the main or midsection (shaft) of a long bone. It is made up of cortical bone and usually contains bone marrow and adipose tissue (fat).
It is a middle tubular part composed of compact bone which surrounds a central marrow cavity which contains red or yellow marrow. In diaphysis, primary ossification occurs.
Ewing sarcoma tends to occur at the diaphysis.[3]
- ^ OED 2nd edition, 1989.
- ^ Entry "diaphysis" in Merriam-Webster Online Dictionary.
- ^ Physical Medicine and Rehabilitation Board Review, Cuccurullo