Figure 4: Right epididymo-orchitis in a 79-year-old man. ( a ) Sagittal T2-weighted image depicts enlargement and hypointensity of the right epididymal tail (arrow). ( b ) Transverse DW image (b = 900 s mm−2). The ADC values of the normal contralateral testis (asterisk) were 1.79 × 10−3 mm2 s−1. ADC: apparent diffusion coefficient; DW: diffusion-weighted.