Symptomatic neonatal CNS involvement is most commonly seen in Which group of congenital intrauterine infection __________
**Core Concept**
Congenital intrauterine infections can have significant effects on the central nervous system (CNS) of neonates, leading to various symptoms and long-term consequences. The type of infection and its severity play a crucial role in determining the extent of CNS involvement.
**Why the Correct Answer is Right**
Symptomatic neonatal CNS involvement is most commonly seen in congenital rubella syndrome (CRS). Rubella virus infection during pregnancy can lead to a range of complications, including hearing loss, cataracts, and CNS abnormalities. The virus can cause damage to the developing CNS, resulting in symptoms such as microcephaly, intracranial calcifications, and intellectual disability. The pathophysiology involves the virus infecting neural cells and causing inflammation, leading to damage and disruption of normal brain development.
**Why Each Wrong Option is Incorrect**
* **Option A:** Congenital cytomegalovirus (CMV) infection is a common cause of congenital infection, but it more commonly presents with hearing loss, vision impairment, and growth restriction, rather than symptomatic CNS involvement.
* **Option B:** Congenital toxoplasmosis can cause CNS abnormalities, including hydrocephalus and intracranial calcifications, but it is less common than congenital rubella syndrome.
* **Option C:** Congenital syphilis can cause a range of symptoms, including skin rashes and neurologic abnormalities, but it is not as commonly associated with symptomatic CNS involvement as congenital rubella syndrome.
**Clinical Pearl / High-Yield Fact**
Remember the "3 C's" of congenital rubella syndrome: cataracts, cardiac defects, and CNS abnormalities. This mnemonic can help you recall the common manifestations of CRS.
**Correct Answer:** D.