BONE TB DIAGNOSIS CANNOT BE CONFIRMED

My name is (…) from Australia. My nephew – (…), (male) aged 16 year, living in Bangladesh, has been suffering an acute pain in his spine. Doctor in Bangladesh wasn’t able to unambiguously diagnose his disease, however based on some of the medical investigation such as MRI scan and assessing the symptoms they strongly suspect that (my nephew) has been suffering from Bone TB. As the diagnosis was not unequivocal so the prescribed course of the treatment given by the doctors in Bangladesh doesn’t build a solid confidence in us. In that circumstance my sister brought him to Hyderabad, India as India is deemed to be better than Bangladesh in regards to medical science. However, the outcome is almost absolutely identical. In this circumstance we are seriously confused and cannot take our decision, whether we should go for surgery or TB medication. We are even thinking about taking the patient to Bangkok as Bangkok is even better than India.
Please give me a guideline.
Kindest regards,
(…)