A 6-month-old boy was born with hypospadias. This condition is due to failure in the development of which of the following?
**Core Concept**
Hypospadias is a congenital anomaly characterized by the incomplete development of the urethral tube during embryogenesis. This condition is associated with the failure of the urethral folds to fuse properly.
**Why the Correct Answer is Right**
The correct answer is related to the embryological development of the urethra, which involves the fusion of the urethral folds. The urethral folds are formed from the mesenchymal condensation of the urethral plate, which is a thickening of the urethral epithelium. Failure of the urethral folds to fuse results in the incomplete formation of the urethral tube, leading to hypospadias. The urethral folds are influenced by the presence of androgens, particularly dihydrotestosterone (DHT), which is essential for the normal development of the male urethra.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not directly related to the development of the urethra in hypospadias. The development of the bladder is a separate process that occurs earlier in embryogenesis.
* **Option B:** This option is incorrect because the development of the testes is not directly related to the fusion of the urethral folds. While androgens are essential for the development of the male urethra, the development of the testes is a separate process.
* **Option D:** This option is not relevant to the development of the urethra in hypospadias. The development of the penis is a separate process that involves the fusion of the genital tubercle.
**Clinical Pearl / High-Yield Fact**
Hypospadias is a common congenital anomaly that occurs in approximately 1 in every 200 male births. It is often associated with other developmental anomalies, such as undescended testes or inguinal hernias.
**Correct Answer: C.**