If anyone is searching for some guidance on nerve pain to the testes, I MAY be able to help.
This has been part of my disability for 17 years. Back then, most clinicians believed that spinal defects at certain levels caused radiating pain to predictable, defined areas or dermatomes, or they pretended to believe this.
The lumbar and sacral nerve plexuses and their distal peripheral nerves are not the same in all people.
Thoracic disc injuries and lesions, lumbar injuries, and sacral defects can all produce radiating nerve pain to the testicles,
and to lots of other deep tissues throughout the abdomen, pelvis, and legs.
Part of the reason physicians, chiropractors, physical therapists, radiologists, etc. insist on their rigid "map" of dermatomal pain is because they have a massively profitable system for diagnosing and doing procedures. There are other good reasons why they feel they should stick with that scheme. I wouldn't have been able to make it past the first couple years without an old university urologist and an old surgeon giving me their explanation for radiating nerve pain to the testes.