Megalopenis

(1)

Pediatric Surgery, Al Azher University, Cairo, Egypt

Abstract

Megalopenis has defined objectively as the penile length more than 2 SD above the mean normal length for age. Abnormal largeness of the penis is an anomaly whereby the baby delivered with a large phallus, or it is enlarges rapidly in childhood, this may be a primary rare isolated non syndromic anomalies or due to abnormal high level of production of testosterone.

Keywords

MegalopenisPenile hypertrophyMacropenis

Definition

Megalopenis has defined objectively as the penile length more than 2 SD above the mean normal length for age (Fig. 10.1). Abnormal largeness of the penis is an anomaly whereby the baby delivered with a large phallus, or it is enlarges rapidly in childhood, this may be a primary rare isolated non syndromic anomalies or due to abnormal high level of production of testosterone.

Fig. 10.1

Normal penile size according to the age. Average penis size in correlation with age. The upper and lower graph displays the 2 sigma curves [3]

Nomenclature

Megalopenis, Macrophallus, Penile hypertrophy and Macropenis.

10.1 Eitiology

Macropenis could be classified as a rare primary anomaly in a normal neonate, and this very rare condition scantly reported, without any detectable etiology, and a secondary macrophallus due to high level of production of testosterone e.g., interstitial cell tumors of the testicle, hyperplasia or tumors of the adrenal cortex, or secondary to other hypothalamic tumour associated with precocious puberty (Fig. 10.2).