A 21-year-old member asked:
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can a chest x-ray be substituted for a tst?

2 doctor answers
Dr. Richard Orr
43 years experience Surgical Oncology
What is TST?: If you mean tuberculin skin test - no. A chest X-ray may diagnose active tb.
Answered on Sep 24, 2016
Dr. James Ferguson
45 years experience Pediatrics
Not as specific: The tst is an evaluation of past exposure with no, latent or active disease from tuberculosis. A chest x-ray is often done in followup looking for signs of active TB & that study may trigger additional studies.A random chest x-ray would not give the same information. You could have latent TB with no x-ray findings or x-ray findings from some other process.
Answered on Dec 22, 2019

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