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  • Title: Transrectal US and endorectal MR imaging in partial and complete obstruction of the seminal duct system. A comparative study.
    Author: Engin G, Kadioğlu A, Orhan I, Akdöl S, Rozanes I.
    Journal: Acta Radiol; 2000 May; 41(3):288-95. PubMed ID: 10866088.
    Abstract:
    PURPOSE: To evaluate transrectal ultrasonography (US) and MR imaging findings of infertile patients with suspected complete or partial obstruction of the seminal duct system. MATERIAL AND METHODS: Two hundred and eighteen infertile patients with low ejaculate volume were evaluated by transrectal US. Endorectal MR imaging was performed on 62/218 patients. Prostatic cysts, ejaculatory duct (ED) dilatation (>2 mm in width), ED calculi or calcifications, seminal vesicle (SV) dilatation (a.p. diameter >15 mm), SV hypo/agenesis (a.p. diameter <7 mm), SV cysts (>5 mm), vasal agenesis and chronic prostatitis (coarse calcifications, heterogeneity in prostate) were considered significant findings for obstruction of the seminal duct system. RESULTS: Pathologic findings were detected in 75% and 61% of patients with azoospermia on transrectal US and MR imaging, respectively. Transrectal US and MR imaging did not reveal any pathologies in 64.7% and 59.1% of patients with nonazoospermia, respectively. The incidences of hypoplastic/atrophic SV (12/48 vs. 5/170), SV agenesis (6/48 vs. 1/170), vasal agenesis (5/48 vs. 1/170) were significantly higher in the azoospermic subgroup (p<0.002). CONCLUSION: US is a good method for initial evaluation of these patients especially in complete obstruction. Endorectal MR imaging should be reserved for selected patients in whom results of transrectal US are not conclusive.
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