Minor morphological aberrations in children with isolated urinary tract malformations

Area of Science:

• Medical Genetics
• Developmental Biology
• Pediatric Nephrology

Background:

• Minor morphological aberrations (MMAs) are subtle physical variations.
• Understanding MMA prevalence aids in diagnosing complex genetic and developmental conditions.

Purpose of the Study:

• To determine the prevalence of 54 MMAs in children with isolated urinary tract malformations and multiple major birth defects.
• To compare MMA rates between patient groups and healthy controls.

Main Methods:

• A case-control study involving 138 children with isolated urinary tract malformations, 32 with multiple major birth defects, and matched controls.
• Systematic assessment for 54 predefined MMAs.
• Statistical analysis of MMA prevalence ratios.

Main Results:

• The MMA/subject ratio was significantly higher in patients with multiple malformations (2.50) compared to isolated renal abnormalities (0.80) and controls (0.76).
• No significant difference in MMA prevalence was observed between isolated renal abnormality patients and controls.
• Supernumerary nipples showed a significantly higher prevalence (9.4%) in patients with isolated urinary tract abnormalities versus controls (1.8%).

Conclusions:

• Multiple major birth defects are associated with a substantially higher burden of minor morphological aberrations.
• Isolated urinary tract abnormalities, while not showing increased overall MMAs, are specifically associated with a higher prevalence of supernumerary nipples.
• MMAs can serve as potential indicators for underlying genetic or developmental issues, particularly in conjunction with major organ system malformations.