True enough, I tested positive for the tuberculin test but negative for the chest xray.
[twishdadish.wordpress.com]
Most often, more than 85% cases of tested patients are positive, having an induration diameter on the skin spot greater than 10 mm.
[symptoma.com]
[…] and accuracy of 90.9%, 96.4%, 81.1%, 98.4%, and 95.6%, respectively. [4] Other Tests and Procedures for Scrofula Purified protein derivative For tuberculosis, skin testing
[emedicine.com]