Benign testicular enlargement due to diffuse interstitial fibrosis associated with cryptorchid testis in 11-month-old boy.

Benign testicular enlargement secondary to diffuse interstitial fibrosis is a rare clinical entity, especially in pediatric patients. To our knowledge, this is the first pediatric case reported of benign testicular enlargement due to interstitial fibrosis in a cryptorchid testis. We report a rare case of an 11-month-old boy with a cryptorchid testis found intraoperatively to have an asymmetrically enlarged testis secondary to diffuse, benign interstitial fibrosis of the testis. Additionally, we discuss previous case reports of testicular enlargement due to interstitial fibrosis, the potential etiology and the management.