A Case Report of Cystic Dysplasia of the Rete Testis (CDRT)

Abstract

An 11-year-old boy was suspected of having right scrotal hydrocele by his previous doctor because of continuous scrotal swelling. However, it was not a scrotal hydrocele but a testicular mass (45 × 25 × 23 mm, elastic hard). Ultrasonography showed small cysts clustered in the right testicular parenchyma. By MRI, multilocular cystic lesions were also found in the same part. Right renal aplasia and compensatory swelling of the left kidney were also observed. We suspected cystic dysplasia of the rete testis (CDRT) on the basis of the site, morphology, and characteristic urinary tract malformations, and performed mass nuclear exclusion. Histopathological findings of the excised specimens also showed that there were no heterotypic epithelial cells and that part of the normal testis network had expanded to the cystic lesions. It was a finding consistent with CDRT. The definitions of CDRT are unclear and there are few reports. Since it is derived from the rete testis, there is concern about the impairment of postoperative sperm-transporting ability, but in this case, it was expected that hormone productivity can be maintained by selecting tumor nucleus surgery. Currently, two and a half years have passed since the operation, but there has been no recurrence. It is considered that follow-up while taking note of recurrence is necessary in the future.