Cystic dysplasia of the testis is a rare disorder, characterized by irregular cystic spaces within the mediastinum or rete testis. Ipsilateral renal defects are seen in many patients with cystic dysplasia of the testis. Although cystic dysplasia of the testis is considered a benign lesion, it has typically been treated with orchiectomy. We report a child with cystic dysplasia of the testis in whom spontaneous regression of the US findings occurred. This suggests that conservative management, through regular observation with US, may be the more desirable initial course of treatment for patients with this disorder.
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