diaphysis

[Greek diaphusis, spinous process of the tibia, from diaphuesthai, to grow between : dia-, dia- + phuesthai, to grow, middle voice of phuein.]

The shaft of a long bone.

The central shaft of a long bone consisting mainly of compact bone surrounding a cavity (see medullary cavity).

Pl. diaphyses.
1. the portion of a long bone between the ends or extremities, which are usually articular, and wider than the shaft; it consists of a tube of compact bone, enclosing the medullary cavity. Called also shaft.
2. the portion of a bone formed from a primary center of ossification.

Diaphysis
Gray's	subject #17 79
MeSH	Diaphyses

The diaphysis is the main or mid section (shaft) of a long bone. It is made up of cortical bone and usually contains bone marrow and adipose tissue (fat).

Contents 1 Clinical significance 2 References 3 Additional images 4 See also

Clinical significance

An aggressive form of childhood bone cancer, Ewing's sarcoma, usually occurs in the diaphysis.^[1]

Other diaphyseal tumors or lesions include lymphoma, myeloma, fibrous dysplasia, enchondroma, adamantinoma, and osteoid osteoma.^[2]

References

1. ^ Bernstein M, Kovar H, Paulussen M, et al. (May 2006). "Ewing's sarcoma family of tumors: current management". Oncologist 11 (5): 503–19. doi:10.1634/theoncologist.11-5-503. PMID 16720851. 
2. ^ "Inroductory Course". http://www.umdnj.edu/tutorweb/introductory.htm. Retrieved 2009-03-12. 

Additional images

Long bone

See also

• metaphysis
• epiphysis

v • d • e Musculoskeletal system · connective tissue: bone and cartilage (TA A02.0 · GA 2.86-95) Cartilage perichondrium · fibrocartilage callus · metaphysis cells (chondroblast · chondrocyte) types (hyaline · elastic · fibrous) Bone Ossification intramembranous · endochondral Cycle osteoblast · osteoid · osteocyte · osteoclast Types cancellous · cortical Regions subchondral bone · epiphysis · epiphyseal plate/metaphysis · diaphysis Structure osteon / Haversian system · Haversian canals · Volkmann's canals · connective tissue (endosteum · periosteum) · Sharpey's fibres · enthesis · lacunae · canaliculi · trabeculae · medullary cavity · bone marrow Shapes long · short · flat · irregular · sesamoid bone and cartilage navs: anat/physio/dev, noncongen/congen/neoplasia, symptoms+signs/eponymous signs, proc

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