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Is it micropenis? Does size matter?
  1. Katherine Wood,
  2. Vasanta Nanduri,
  3. Nazakat Merchant
  1. Watford General Hospital, Watford, UK
  1. Correspondence to Dr Katherine Wood, Watford General Hospital, Vicarage Road, Watford WD18 0HB, UK; katherinewood1{at}

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A term male infant weighing 2.75 kg was referred to the neonatal team due to concerns about small penile size (figure 1). On review he had a stretched penile length of 2 cm, which is a borderline measurement for micropenis but not conclusive (box 1).1–4 He had descended testes, no dysmorphic features or midline defects. During the examination he was also noted to be lethargic; blood glucose was measured and was found to be 0.6 mmol/L.

Box 1

Measuring neonatal penile length and defining micropenis

  • Micropenis is defined as a stretched penile length <2.5 SDs below …

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  • Twitter Follow Nazakat Merchant @Naazmerchant

  • Contributors KW wrote the case report. VN and NM edited the report before submission.

  • Competing interests None.

  • Patient consent Parental/guardian consent obtained.

  • Provenance and peer review Not commissioned; internally peer reviewed.