I used to get sharp cramps in the back of my hands , at work we had a lot of fine finger use and pinch grip- but never got any bone or finger lock ups.

I know a few have mentioned a "clawing" of the hand at times.
Mostly those with severe long time cases.
Ring & pinky fingers {ulnar nerve} sx are the usual & more common problem w/TOS but I believe the other nerves can be affected also.

It gets down to the ruling in or out of other possible causes.
If no other cause is found then TOS would be the culprit.

I get sore muscles and/or triggerpoints across my shoulders & upper back - but sometimes when chiro checks there are tender spots that I hadn't noticed. They go away after he does adjustments and ultrasound.aaahhh...