May a man look at and/or touch his reproductive organ while bathing? made me think of another related question.
It has been medically suggested that men do a regular self-check for testicular cancer. Would it be Halachically appropriate to perform such a regular check, being that this involves examining the testicles carefully using one's hands (as well as looking at them)?
An answer to this question should be a thorough treatment of the subject, covering many of the Halachic bases (such as touching the scrotum in general, cases of fear, the factors that the statistics may play, etc.), or a source that directly discusses this issue.