Different tests answer different questions
A pathology stain may measure a protein; sequencing can identify selected DNA or RNA changes. Tumor testing looks for changes in the cancer, while germline testing evaluates inherited variants. One does not automatically replace the other.
Match the result to the treatment setting
The exact variant, assay, cancer type and previous treatment matter. A positive result may support an approved drug or a trial; a variant of uncertain significance is not an established treatment target. A negative result may also reflect sample or test limitations.
Make the report useful
Bring the complete report, specimen date and pathology diagnosis. Ask which finding changes care now, whether confirmation is needed and whether progression could justify repeat testing.
Explore relevant diagnoses
Advanced therapies & clinical trials
When reviewing a new option, separate the evidence for the treatment from the practical route to receive it. An approval in one country does not establish availability or eligibility elsewhere.
| Option | What to verify |
|---|---|
| Approved treatment | Exact indication, age group, treatment line, biomarker requirements and the current local prescribing information. |
| Clinical trial | Recruiting site, inclusion and exclusion criteria, prior therapies, travel and follow-up requirements. Participation is not guaranteed. |
| Off-label or special access | Clinical rationale, local legal route, risks, costs and the treating institution’s ability to provide follow-up. |
Preparing for a second opinion
A second opinion is especially useful when pathology is uncertain, several treatment paths are possible, disease has returned or a new therapy is being considered. Coordinate timing with the treating team so necessary care is not delayed.
- Pathology report and access to tissue slides or blocks
- Imaging reports and the actual scans, with dates
- Molecular and biomarker reports, including the test method
- Treatment names, dates, response and major side effects
- Current medicines, other conditions and the questions you want answered
Sources & content updates
This guide brings together current cancer classification and treatment information from the clinical sources below, with practical questions for specialist review.
National Cancer Institute: Precision treatment & molecular testing