Microphallus

What it means

Length of penis more than 2 SD below the mean for age accompanied by hypospadias.

Traditionally a distinction is made between a Short penis, a short penis with otherwise normal anatomy, versus microphallus, a short penis with hypospadias. Penile length is the distance between the midline attachment of the gently stretched, flaccid penis above the pubic symphysis and tip of the glans. A short penis should be differentiated from an inconspicuous penis, for instance due to excessive suprapubic fat ("buried"). We also recognize that shortness of a penis is defined by some subspecialists as penile length more than 2.5 SD below the mean.

Rare diseases that can present with this5

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category