**Core Concept**
Unilateral renal agenesis, also known as solitary kidney or renal aplasia, is a congenital anomaly where one kidney is absent at birth. This condition can be associated with various **genetic syndromes** and **anatomical anomalies**. The underlying cause is often related to **embryological development**.

**Why the Correct Answer is Right**
The correct answer is associated with an increased risk of **cardiovascular** and **genitourinary anomalies**. Individuals with unilateral renal agenesis may have **horseshoe kidney**, **cryptorchidism**, or other **congenital malformations**. The **renal development** is closely linked to the development of other systems, which explains the association with these anomalies.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is not directly related to the common associations of unilateral renal agenesis.
**Option B:** This option is incorrect as it is not a well-established correlation with unilateral renal agenesis.
**Option C:** This option is incorrect because, although it may be related to renal issues, it is not specifically associated with unilateral renal agenesis.
**Option D:** This option is incorrect as it is not a recognized correlation with this condition.

**Clinical Pearl / High-Yield Fact**
Unilateral renal agenesis is often asymptomatic and discovered incidentally during imaging studies. It is essential to recognize the association with other congenital anomalies to provide appropriate **multisystem evaluation** and **genetic counseling**.

**Correct Answer:** D. Increased risk of cardiovascular and genitourinary anomalies