Caudal regression syndrome is seen in babies of mother having :
**Core Concept**
Caudal regression syndrome is a rare congenital disorder characterized by the abnormal development of the lower spine, often associated with maternal **diabetes mellitus**. This condition involves a spectrum of anomalies, ranging from mild sacral hypoplasia to more severe forms with lumbosacral agenesis. The underlying pathophysiology is thought to involve **teratogenic** effects of hyperglycemia on embryonic development.
**Why the Correct Answer is Right**
The correct answer is related to **diabetes mellitus** in the mother, as this condition is known to increase the risk of caudal regression syndrome in the offspring. The exact mechanism is not fully understood, but it is believed that **hyperglycemia** can disrupt the normal development of the caudal region of the embryo, leading to the characteristic anomalies of this syndrome. Maternal **diabetes** is a well-established risk factor for this condition.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is not directly related to the known risk factors for caudal regression syndrome.
**Option B:** Similarly, this option does not have a established link to the condition.
**Option C:** This option is also incorrect as it is not a recognized cause of caudal regression syndrome.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that **maternal diabetes** significantly increases the risk of congenital malformations, including caudal regression syndrome. This highlights the importance of tight glycemic control in pregnant women with diabetes to minimize the risk of such anomalies.
**Correct Answer:** D. Diabetes Mellitus.