• What is a GeneXpert test?

I underwent a biopsy but the technician dipped it in formalin. Now I have been advised to undergo another biopsy for the GeneXpert test. What is this test and what does it determine?

2 Answers

  • Pathologist
  • Roseburg, OR

TB GeneXpert test is a rapid test that can simultaneously identify Mycobacterium tuberculosis (MTB) and resistance to rifampin from sputum. This test detects the DNA in TB bacteria. Thank you.

  • Pathologist
  • Tempe, Arizona

Genetic testing (depending on the type) often requires viable tissue. Formaldehyde (formalin) fixes tissues, rendering them non-viable. There are some disease conditions that can be confirmed by genetic testing. These are many, each with a specific type of genetic testing.

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