Short 4th metatarsal is seen in –
**Core Concept**
A short 4th metatarsal is a congenital anomaly characterized by a metatarsal bone that is significantly shorter than the others. This condition is often associated with a specific genetic mutation and can lead to various complications, including pain and difficulty walking.
**Why the Correct Answer is Right**
The short 4th metatarsal is a result of a mutation in the LRP4 gene, which codes for a protein involved in the development of the limbs. This mutation leads to a failure of the 4th metatarsal to grow properly, resulting in a shorter bone. The short 4th metatarsal can cause difficulties with weight-bearing and can lead to pain and discomfort in the foot.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect as it does not specify the correct genetic mutation associated with the short 4th metatarsal.
* **Option B:** This option is incorrect as it does not accurately describe the underlying cause of the short 4th metatarsal.
* **Option C:** This option is incorrect as it does not provide a clear and accurate explanation of the condition.
**Clinical Pearl / High-Yield Fact**
A short 4th metatarsal is a relatively rare condition, but it can be a significant cause of foot pain and discomfort. It is essential for clinicians to be aware of this condition and to consider it in the differential diagnosis for patients presenting with foot pain.
**Correct Answer:** C. A short 4th metatarsal is associated with a mutation in the LRP4 gene.