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Cloacal dysgenesis sequence
Archana Bargaje1, John F Yerger, Adib Khouzami
1Department of Pathology, Loyola University Medical Center, Maywood, IL 60153, USA. abargaje@lumc.edu
Annals of Diagnostic Pathology
|January 1, 2008
Summary
Cloacal dysgenesis sequence is a rare congenital malformation characterized by the absence of key openings. This case highlights the critical need for accurate prenatal diagnosis and differentiation from other conditions.
Area of Science:
- Medical Genetics
- Developmental Biology
- Pediatric Surgery
Background:
- Cloacal dysgenesis sequence (CDS) is a rare congenital anomaly affecting neonates, with an incidence ranging from 1:50,000 to 250,000 live births.
- It is characterized by a specific set of primary malformations including a phallus-like structure, smooth perineum, and the absence of urethral, vaginal, and anal openings.
Observation:
- This report details a case of a 4-day-old preterm female neonate diagnosed with CDS.
- Prenatal ultrasound revealed findings suggestive of CDS, including echogenic bowel, dilated colon, perineal mass, dilated bladder, and fetal hydrops.
- Autopsy confirmed the absence of patent urethral, vaginal, and anal openings, an enlarged clitoral-like structure, renal hydronephrosis, hydroureter, megacolon, and urethral agenesis.
Findings:
- The neonate presented with classic features of cloacal dysgenesis sequence.
- Chromosomal analysis revealed a normal female karyotype, ruling out chromosomal abnormalities as the cause.
- The condition results from a defect in cloaca formation during early gestation (first 50 days).
Implications:
- Accurate differentiation of CDS from conditions with better prognoses, such as fetal obstructive uropathies and persistent cloaca, is crucial for management.
- CDS is typically a fatal condition, underscoring the importance of early and precise diagnosis.
- Understanding the developmental origins of CDS aids in genetic counseling and potentially future research into prevention or treatment strategies.
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