This is a retrospective data collection study with the purpose of determining differences in scrotal ultrasound findings between patients with and those without a history of vasectomy. Data collected from the two age-matched groups will consist of medical and surgical history related to vasectomy and the clinical findings of previously performed scrotal ultrasound scans. An electronic database will be constructed for the purpose of recording this data and the information for the two groups will be compared to determine which of the ultrasound findings may be attributed to vasectomy.