question: my partner has just discovered a lump in his left testicle... his testicle is enlarged and the lump is grainy to the touch. he feels a dull ache in his groin and it is painful to ejaculate. He is 32 yrs old. 6foot 4inches tall. Approx 16 stone in weight. He is experiencing lower back pain (although he has recently recieved treatment for a slipped disk)