Paget's disease is characterized by which pattern of bone turnover and remodeling?

Paget's disease is characterized by which pattern of bone turnover and remodeling?

• A. Osteoporosis only
• B. Excessive resorption and formation with abnormal remodeling
• C. Osteoarthritis involvement
• D. Rheumatoid arthritis-like bone destruction

Answer: (B)

Paget's disease shows a high bone turnover with a sequence of events: osteoclasts resorb bone aggressively, and then osteoblasts lay down new bone rapidly. However, the remodeling is disorganized, producing a mosaic of woven and lamellar bone rather than a regular, well-ordered structure. This combination—excessive resorption followed by excessive, abnormal formation—gives bones that are enlarged and structurally weak. This pattern is distinctive from simple osteoporosis (loss of bone mass), osteoarthritis (degenerative joint changes), or rheumatoid-arthritis–like bone destruction (inflammatory erosions).

Paget's disease shows a high bone turnover with a sequence of events: osteoclasts resorb bone aggressively, and then osteoblasts lay down new bone rapidly. However, the remodeling is disorganized, producing a mosaic of woven and lamellar bone rather than a regular, well-ordered structure. This combination—excessive resorption followed by excessive, abnormal formation—gives bones that are enlarged and structurally weak.

This pattern is distinctive from simple osteoporosis (loss of bone mass), osteoarthritis (degenerative joint changes), or rheumatoid-arthritis–like bone destruction (inflammatory erosions).