Second Opinion / Review

What is Second Opinion test?

Second Opinion test is a pathologist‑tailored set of targeted immunohistochemistry stains applied to a patient’s tissue sample to clarify tumor type, site of origin, and detect therapy‑relevant biomarkers when routine histology is inconclusive. It is used in ambiguous cancers, cancer of unknown primary, or when treatment decisions depend on specific biomarker status, ensuring faster, more accurate, and clinically actionable diagnoses.

Why consider Second Opinion test?

Second Opinion test is used to diagnose cancer by spotting a specific type of antibody attached to the antigen on the cell surface. The purpose of the special staining technique is to spot molecules which usually markers are specifying whether the cancer is benign or malignant

• To resolve difficult differentials where routine H&E and standard stains are inconclusive.
• To identify site of origin in metastasis or cancer of unknown primary using a marker panel tailored to the morphology and clinical clues.
• To assess predictive/prognostic markers (e.g., ER/PR/HER2 in breast, PD‑L1 in lung) that inform therapy decisions, selected as needed for the case.

Who should get tested for Second Opinion test?

• Unclear Diagnosis on Routine Histology – When a biopsy shows ambiguous or poorly differentiated tumor morphology and further marker-based clarification is needed.
• Cancer of Unknown Primary or Uncertain Origin – Especially in metastatic cases to determine tumor lineage, site of origin, and guide next diagnostic or therapeutic steps.
• Cases Requiring Therapy-Relevant Biomarkers – When treatment planning depends on markers like ER/PR, HER2, PD‑L1, Ki‑67, or MMR proteins for prognosis and targeted therapy selection.

More Information about Second Opinion test

Second Opinion test is a specialized laboratory test to detect particular proteins or markers in a tissue sample. It's particularly useful for complex or ambiguous cases where a standard panel doesn't offer enough clarity. This panel is used for final diagnosis of cancerous tissue samples & biopsy by expert histopathologist.

OTHER NAMES: Final Diagnosis Panel, Histopathology, IHC markers, Cancer Diagnosis