1. Case 11

2. Basic clinical data 32-year old male 32-year old male Trauma of scrotal region 1 month before visit of urologist Trauma of scrotal region 1 month before visit of urologist Large, multicystic mass was revealed using ultrasonography Large, multicystic mass was revealed using ultrasonography Orchiectomia was performed Orchiectomia was performed

3. Gross view 10x5x4 cm 10x5x4 cm Multicystic tumor replaced substantial part of testicular mass Multicystic tumor replaced substantial part of testicular mass Whitish on cut surface Whitish on cut surface

4. ???

5. chamois

6. Tumor was extensively sampled Tumor was extensively sampled Mucinous cystadenoma probably with further progression into tumor of borderline malignancy Mucinous cystadenoma probably with further progression into tumor of borderline malignancy

7. Mucinous cystadenoma of the epididymis Group of ovarian-type tumors Group of ovarian-type tumors Usually serous tumors Usually serous tumors Mucinous tumors, Breners tumors are exceptionally rares Mucinous tumors, Breners tumors are exceptionally rares Ovarian-types usually occured in young adults (3rd decade) Ovarian-types usually occured in young adults (3rd decade) Tumors arise probably from appendix testis, from Müllerian metaplasia or from ovotestis Tumors arise probably from appendix testis, from Müllerian metaplasia or from ovotestis

8. Prognosis Uncertain, only few cases were documented Uncertain, only few cases were documented Prognosis could be similar like in the ovarian counterparts Prognosis could be similar like in the ovarian counterparts

9. Diferential diagnostics Particularly it is necessary to distinguish mucinous or serous structures of TERATOMA or mixed germ-cell tumor Particularly it is necessary to distinguish mucinous or serous structures of TERATOMA or mixed germ-cell tumor GOOD SAMPLING GOOD SAMPLING