Question 1

Purpose of the Procedure

Accepted Answer

Determining the effectiveness of immunotherapy. Quantifying PD-L1 protein on tumor cells. Avoiding treatments the tumor may not respond to.

Question 2

When is this test ordered?

Accepted Answer

Diagnosis of non-small cell lung cancer (NSCLC). Advanced bladder or kidney cancer cases. Evaluating treatment options for melanoma patients.

Question 3

Understanding the Results

Accepted Answer

Positive results indicate a higher likelihood of responding to immunotherapy. Negative results may suggest alternative treatments like chemotherapy. Results are often reported as a percentage (Tumor Proportion Score).

Optimize Your Cancer Immunotherapy Plan - PD-L1 Protein Expression Immunohistochemistry Test