Carpal fusion is seen in?
**Core Concept**
Carpal fusion, also known as carpal coalition, is a congenital or acquired condition where two or more carpal bones in the wrist fuse together. This can be due to various reasons, including trauma, infection, or inflammatory diseases. The **wrist joint** and its surrounding bones are affected in this condition.
**Why the Correct Answer is Right**
The correct answer is related to a specific condition that affects the wrist, causing carpal fusion. Rheumatoid arthritis is a common condition that can lead to carpal fusion, as it causes inflammation and destruction of the joints, leading to **bone erosion** and eventual fusion.
**Why Each Wrong Option is Incorrect**
**Option A:** is incorrect because it is not directly related to carpal fusion.
**Option B:** is incorrect as it is not a common cause of carpal fusion.
**Option D:** is incorrect because, although it can cause wrist problems, it is not typically associated with carpal fusion.
**Why Each Wrong Option is Incorrect** (continued)
More information about the incorrect options is not provided, so a general statement is given.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that carpal fusion can significantly limit **wrist mobility** and cause chronic pain.
**Correct Answer:** D. Rheumatoid arthritis.