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BJU Int. 2012 Mar;109(5):740-4. doi: 10.1111/j.1464-410X.2011.10338.x. Epub 2011 Jun 28.

Establishing a reference range for penile length in Caucasian British men: a prospective study of 609 men.

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1
Department of Urology, Western General Hospital, Edinburgh and St John's Hospital, Livingston, UK. saak_2000@yahoo.co.uk

Abstract

OBJECTIVES:

• To establish a reference range for adult male genital size in the UK using penile length measurements. • To compare the reference ranges for normal penile length reported from several different countries and the anthropometric differences noted between different nationalities and ethnic backgrounds.

METHODS AND MATERIALS:

• Over 20 months, genital measurements were taken from all men undergoing routine examination in clinics (n= 499) and in operating theatres during examination under anaesthetic (n= 110). • Using a rigid metric ruler three penile measurements were taken: flaccid pendulous penile length, flaccid penopubic penile length (to the pubic arch) and stretched flaccid penopubic length. In addition, testicular size was measured using an orchidometer. • The patient's age and the reason for referral were recorded. • Statistical analysis was carried out using Pearson correlation analysis.

RESULTS:

• Measurements from 610 patients aged 16-90 years were available for analysis. • The mean penile lengths were: pendulous length 8.7 cm (sd 1.6 cm), penopubic length 10.2 cm (sd 1.4 cm) and stretched length 14.3 cm (sd 1.7 cm). The mean testicular volume was 19.8 mL (sd 5.4 mL) for both left and right testicles. • Men with penile disease (including phimosis and Peyronie's disease) had slightly reduced penile length (pendulous -3.3 mm, P= 0.014; penopubic -2.3 mm, P= 0.029; stretched -5.1 mm, P < 0.001) compared with other referral groups (erectile dysfunction, testicular disease, prostate and bladder disease). • There was no significant correlation between penile length and age or testicular size

CONCLUSION:

• These data establish a reference range for adult male genital size in the UK, which should be helpful for urologists when counselling patients.

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