osteoid

Osteoid is a protein mixture secreted by osteoblasts that forms the organic matrix of bone. Bone is formed when osteoid mineralizes.

Osteoid is important in several disease processes:

• failure of osteoid to mineralize leads to osteomalacia in adults and rickets in children.
  • focal accumulations of osteoid can lead to Milkman's pseudofractures, which are suggestive of osteomalacia.
  • linear accumulations of osteoid may build perpendicular to the cortical margin and appear as Looser's zones or pseudofractures.
• osteoid osteoma is composed of osteoid and woven bone, both of which can be seen as interconnected trabeculae, sheets, or isolated islands.

Siehe auch:

• Osteoid-Osteom
• Rachitis
• Loosersche Umbauzonen
• Osteomalazie

und weiter:

• bone-forming tumours