Diagnosis: S. mansoni calcified eggs in the seminal vesicle and blue nevus in the prostate.  

            Comment: The location of these eggs in this particular case is very rare (Figs. 1, 2 and 3). Blue nevus of the prostate (Figs. 4 and 5) refers to stromal melanin deposition and glandular melanosis refers to presence of melanin within epithelial cells. Melanotic lesions of the prostate are incidental findings with no evidence of malignant transformation.