i hope you had spine disc tuberculosis
so site of problem is assumed to be spine . also i hope the major course of chemotherapy
is over and you are otherwise symptomatically allright .so before hitting gymm get certain evaluations done
xray of affected area
get your creatine
, vit d3 and vit b12 levels checked .
then under giudance of a trained sports physio you can start your gym in a sensible way to avoid getting sports injury
be cautious and sensible . go slow but be persistant and avoiding sports injuries