Which condition is described as brittle bone disease?

Which condition is described as brittle bone disease?

• A. Osteogenesis imperfecta
• B. Osteoporosis
• C. Osteosarcoma
• D. Paget's disease

Answer: (A)

Brittle bone disease points to a genetic problem with the bone’s basic building material. Osteogenesis imperfecta causes bones to fracture easily because of defects in type I collagen, a key component of the bone matrix. This makes bones unusually fragile from early life, often with multiple fractures with minimal trauma, and can be accompanied by other features like blue-tinged sclerae, dental problems, or hearing loss later on. This is different from osteoporosis, which is about bone density loss that typically occurs with aging and not due to a collagen defect. It’s also not a cancer like osteosarcoma, nor a remodeling disorder like Paget’s disease, which affect bone structure in different ways and populations.

Brittle bone disease points to a genetic problem with the bone’s basic building material. Osteogenesis imperfecta causes bones to fracture easily because of defects in type I collagen, a key component of the bone matrix. This makes bones unusually fragile from early life, often with multiple fractures with minimal trauma, and can be accompanied by other features like blue-tinged sclerae, dental problems, or hearing loss later on.

This is different from osteoporosis, which is about bone density loss that typically occurs with aging and not due to a collagen defect. It’s also not a cancer like osteosarcoma, nor a remodeling disorder like Paget’s disease, which affect bone structure in different ways and populations.