It is interesting that obese patients suffering from inactive pulmonary tuberculosis can be safely treated. We have under very careful control treated patients as early as three months after they were pronounced inactive and have never seen a relapse occur during or shortly after treatment. In fact, we only have one case on our records in which active tuberculosis developed in a young man about one year after a treatment which had lasted three weeks. Earlier X-rays showed a calcified spot from a childhood infection which had not produced clinical symptoms. There was a family history of tuberculosis, and his illness started under adverse conditions which certainly had nothing to do with the treatment. Residual calcifications from an early infection are exceedingly common, and we never consider them a contraindication to treatment.
Source: Pounds and Inches by Dr. Simeons