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Difficulty: HardNeonatal Disorders

Match each classic neonatal clinical presentation with the most likely responsible congenital infection.

  • Congenital CytomegalovirusMicrocephaly, petechiae, hepatosplenomegaly, and predominantly periventricular calcifications on cranial imaging.
  • Congenital ToxoplasmosisMacrocephaly, chorioretinitis, and scattered diffuse parenchymal calcifications on cranial imaging.
  • Congenital SyphilisCopious persistent rhinitis, a desquamating maculopapular rash involving the palms and soles, and hepatosplenomegaly.
  • Congenital Rubella SyndromeContinuous machine-like murmur, absent red reflex bilaterally, and sensorineural hearing loss.

Answer

Congenital Cytomegalovirus aligns with periventricular calcifications; Congenital Toxoplasmosis aligns with diffuse parenchymal calcifications; Congenital Syphilis aligns with rhinitis and palmar/plantar rash; Congenital Rubella Syndrome aligns with cataracts and a machine-like murmur.
Each of the major congenital infections exhibits a distinctive clinical signature. Congenital Cytomegalovirus (CMV) causes periventricular calcifications, frequently accompanied by microcephaly and petechiae. Congenital Toxoplasmosis is marked by diffuse parenchymal calcifications, chorioretinitis, and hydrocephalus resulting in macrocephaly. Congenital Syphilis typically presents in the early neonatal period with profuse rhinitis ('snuffles'), hepatosplenomegaly, and a desquamating maculopapular rash that characteristically includes the palms and soles. Congenital Rubella Syndrome is defined by the classic triad of cataracts (noted as an absent red reflex), sensorineural hearing loss, and congenital heart disease, most commonly a patent ductus arteriosus.

Step-by-Step Solution

1
Analyze the cranial imaging findings described in the clinical presentations.
Periventricular calcifications identify CMV, whereas diffuse parenchymal calcifications indicate Toxoplasmosis.
Distinguishing the specific anatomical location of intracranial calcifications is the most reliable way to differentiate between congenital CMV and Toxoplasmosis on examinations.
2
Evaluate the distinct physical examination findings for the remaining infections.
The presence of copious rhinitis ('snuffles') and a rash on the palms and soles is diagnostic for early congenital Syphilis. The combination of an absent red reflex (cataracts) and a continuous machine-like murmur (patent ductus arteriosus) identifies Rubella.
Syphilis and Rubella have pathognomonic physical signs that typically lack the prominent intracranial calcifications seen in CMV and Toxoplasmosis.

Key Concept

Clinical and radiological differentiation of TORCH congenital infections in neonates.
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Topics

Neonatal Disorders

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