Developmental bone diseases — definition?
Hereditary or acquired disorders from abnormal bone development.
Osteogenesis imperfecta — cause?
Defective synthesis of type I collagen.
Osteopetrosis — characteristic feature?
Reduced osteoclastic activity leading to dense, brittle bones.
Paget disease — key process?
Excessive osteoclastic resorption followed by disorganized formation.
Rickets vs osteomalacia — difference?
Rickets affects children; osteomalacia affects adults.
Bone mass decrease — main disease?
Osteoporosis.
Osteoporosis — primary cause?
Imbalance favoring resorption over formation.
Osteoclast dysfunction — example?
Osteopetrosis, due to decreased osteoclast activity.
Mineral homeostasis disorders — example?
Rickets, osteomalacia, hyperparathyroidism.
Osteomyelitis — common cause?
Staphylococcus aureus infection.
Sequestrum — definition?
Dead bone separated from living tissue in infection.
Involucrum — definition?
Reactive new bone around infected bone.
Bone tumors — classification basis?
Tissue origin, benign/malignant, primary/secondary.
Osteoid osteoma — key feature?
Small, painful benign tumor with a nidus.
Osteosarcoma — origin?
Malignant tumor producing osteoid, common in young.
Chondrosarcoma — tissue type?
Malignant cartilage-producing tumor.
Ewing sarcoma — typical age?
Children and adolescents.
Giant cell tumor — histology?
Mononuclear stromal cells with multinucleated giant cells.
Joint disease — main categories?
Degenerative, inflammatory, crystal-induced, infectious, tumor-related.
Osteoarthritis — hallmark?
Cartilage erosion and osteophyte formation.
Testez vos connaissances avec un QCM de 10 questions sur Bone Pathology: Development, Tumors, and Joint Diseases.
1. What is osteogenesis imperfecta primarily characterized by?
2. Which characteristic feature is commonly observed in patients with osteogenesis imperfecta, a type 1 collagen disorder?
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