Stretched penile length in boys with hypospadias: Population-based analysis using validated nomogram

Area of Science:

• Pediatric Urology
• Andrology
• Developmental Biology

Background:

• Hypospadias affects 1 in 200-300 male births, raising parental concerns about penile size.
• Limited data exists on stretched penile length (SPL) in hypospadias patients compared to normative standards.

Purpose of the Study:

• To analyze SPL distribution in boys with Types I and II hypospadias.
• To compare these measurements against established population-based reference data.

Main Methods:

• Studied 876 boys (aged 1-14) with unoperated distal (Type I) or mid-shaft (Type II) hypospadias.
• Utilized the validated SPLINT technique for independent SPL measurements by two observers.
• Compared measurements to normative data from 1276 Indian children using statistical tests.

Main Results:

• A significant leftward shift in SPL distribution was observed: 71% below the 50th percentile and 41.5% below the 25th percentile.
• Mean SPL was reduced by 6.8% in Type I and 7.5% in Type II hypospadias.
• No significant difference in SPL distribution was found between Type I and Type II hypospadias.

Conclusions:

• Boys with distal and mid-shaft hypospadias exhibit clinically significant SPL reduction.
• SPL reduction follows a continuous pattern and is independent of meatal position.
• Routine SPL assessment with population-specific references is recommended for preoperative counseling.