Abstract
Hypospadias and undescended testicles (UDT) are common congenital conditions, affecting approximately 1 in 125 and 1 in 33 boys, respectively. There has been limited contemporary data regarding the prevalence of Disorders of Sex Development (DSD) in patients with a history of both hypospadias and UDT. Our objective is to determine the prevalence of DSD among patients presenting with hypospadias and UDT. Electronic medical records were reviewed, and a retrospective chart review was conducted on 177 patients that were evaluated at our institution from 2000 to 2021 with a diagnosis of hypospadias and UDT. The degree of hypospadias, presence of and palpability of UDT, and prevalence and type of DSD were recorded. The degree of hypospadias, presence of and palpability of UDT, and prevalence and type of DSD were recorded. Chi-squared and Fisher's exact tests were conducted for descriptive statistical analyses as appropriate. Logistic regression analyses were conducted, with adjusted models including demographic and relevant clinical data. 177 patients were identified with both hypospadias and UDT, with 17/111 (15.3%) diagnosed with DSD. The most common etiology of DSD was mixed gonadal dysgenesis (35.3%; n=6). Proximal hypospadias made up only 59.6% of those without DSD vs. 100% of those with confirmed DSD (p=0.0044). A significantly smaller proportion of DSD patients had bilaterally palpable gonads compared to those without DSD (29.4% vs. 79.8%, p<0.0001). Compared to those with palpable testes, patients with one non-palpable testicle had up to 26.67 times greater odds of DSD. To date, we present the largest cohort of patients that have undergone DSD work up for the combined presentation of hypospadias and UDT. Our findings highlight an increase in DSD diagnosis in proximal hypospadias patients with non-palpable UDTs, which offers further evidence and support for pursuing DSD diagnostic work-up in all proximal hypospadias patients with UDTs.
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