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Figure 1. The relationships of the tunica vaginalis to the testis and epididymis is illustrated from the lateral view and two cross sections at the level of the head and mid-body of the epididymis. The large arrows indicate the sinus of the epididymis posteriorly. Reproduced with permission from de Kretser et.al.1982 in ‘Disturbances in Male Fertility’ Eds K Bandhauer and J Frick, Springer – Verlag Berlin.