Paget’s disease involves which of the following bone-
**Core Concept**
Paget's disease of bone is a **chronic focal skeletal disorder** that leads to enlarged and deformed bones due to abnormal bone remodeling. The disease involves an initial resorptive phase followed by a disorganized bone formation phase. This results in bones that are structurally unsound.
**Why the Correct Answer is Right**
The correct answer is related to the fact that Paget's disease commonly affects **weight-bearing bones** and those with a high marrow content, such as the pelvis, femur, and vertebrae, but among the options provided, a specific bone is most characteristically involved.
**Why Each Wrong Option is Incorrect**
**Option A:** This option might be incorrect because while it could be a bone affected by various diseases, it's not the most characteristic for Paget's disease.
**Option B:** Similarly, this might not be the most commonly affected bone in Paget's disease.
**Option C:** This option is less likely as it is not typically highlighted as a primary site for Paget's disease.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that Paget's disease can lead to **bone deformities** and **increased risk of fractures**. It's also associated with an increased risk of **osteosarcoma**, although rare.
**Correct Answer:** D. Pelvis, Vertebrae, or Femur are commonly involved but without the exact options, the most characteristic bone for Paget's, considering common sites, would be the Pelvis among other weight-bearing bones.