OBSOLETE: Familial hypospadias

Familial hypospadias (Orphanet code 440, now classified as obsolete in Orphanet) refers to the occurrence of hypospadias within families, suggesting a genetic predisposition to this congenital urogenital malformation. Hypospadias is a birth defect in males where the opening of the urethra (the tube that carries urine out of the body) is located on the underside of the penis rather than at the tip. The severity can range from mild (with the opening near the tip of the penis) to severe (with the opening near the scrotum or perineum). Familial cases account for a notable proportion of hypospadias, with studies showing that approximately 7-10% of affected individuals have a first-degree relative who is also affected. The condition primarily affects the male genitourinary system and can be associated with chordee (curvature of the penis), abnormal foreskin distribution, and difficulties with urination or future sexual function if left untreated. The term 'Familial hypospadias' as a distinct Orphanet entity is now considered obsolete, as hypospadias is increasingly understood to be a multifactorial condition influenced by multiple genetic and environmental factors rather than a single Mendelian disorder. Several genes have been implicated in familial clustering, including variants in genes involved in androgen signaling, genital development (such as SRD5A2, AR, ESR1, ESR2, ATF3, MAMLD1, and others), and hormonal pathways. Treatment for hypospadias is surgical, typically performed between 6 and 18 months of age. The surgical repair (urethroplasty) aims to reposition the urethral opening to the tip of the penis, correct any associated penile curvature, and achieve a cosmetically and functionally normal result. Outcomes are generally favorable, though complex or proximal cases may require staged procedures and carry a higher risk of complications such as fistula or stricture formation.

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