I Question the Medical Judgement

When my cousin brother was diagnosed with tuberculosis about twenty years ago, his parents didn't give a second thought and started the long treatment. About five months into the treatment they discovered that the little boy wasn't suffering from tuberculosis. His parents were only thankful that it wasn't TB. Five months of heavy dose didn't matter to them. As years went by the ill effect of heavy doses of wrong drugs showed on his physical features and his mental efficiency.
That was a long time ago and everything was forgiven and forgotten even though my brother is still paying the price each day for error in medical judgement some people made. Over the time everything changed and technology came into hospitals to reduce human errors. But machines are just tools and its the human at the end who has to pass the judgement.
Over the years I was shocked at the number of rumors I heard of people being wrongly diagnosed with TB, and some paying the price with their lives. Advancement of human resources and technology seemed to have made no difference to Bhutan. May be all the rumors I heard are wrong, therefore I may be wrong too if not for what happened early this month.

Photo from  fabulousnurses.com, edited by author   

My nine year old sister was diagnosed with TB from Jigme Dorji Wangchuk National Referral Hospital. She had some swelling below her chin after a long toothache and after series of checkup it was confirmed that it's lymph node tuberculosis called Scrofula. My mother was asking me if they could begin her treatment. I am not a doctor, I am but a loving brother, I don't want to risk my sister. I rushed to Thimphu and found out that all the test reports were negative including the biopsy, which I found from Google as a crucial test. Wikipedia tells me that she should have symptoms such as " fever, chills, malaise and weight loss. As the lesion progresses, skin becomes adhered to the mass and may rupture, forming a sinus and an open wound." but she has none of these except the medical judgement of doctor. I trust the big hospital, I trust the big doctor, but on what basis should I trust this judgement?
I brought my little sister with me and took her to Wangdue Hospital, where I explained my fear and showed the reports to the renowned medical specialist. He checked her neck thoroughly, studied all the reports, took a fresh x-ray and declared that it's NOT tuberculosis. He prescribed her antibiotic for five days after which the swelling subsided.
Now I question the Judgement of that doctor who wanted to fill my sister's stomach with loads of drugs. I even fear that all the rumors I ever heard are true but they all landed nowhere because we Bhutanese are so forgiving. No doctor was ever taken to court for their mistake because we forgive, and because we forgive they take for granted.