Diagnosis basics · 6 min read
How to read a cancer pathology report
A pathology report is a lab document based on tissue or cells examined under a microscope. It often contains details that guide diagnosis and treatment.
Written by OncosAI Editorial Team · Editorial review 2026-07-04
Key takeaways
- The final diagnosis section is important, but not the only useful part.
- Reports may include tumor type, grade, size, margins, lymph nodes, and biomarkers.
- Pathology wording can be technical; ask your care team to translate it.
- A report may be updated if additional testing is performed.
What a pathology report is
A pathology report is written after a biopsy, surgery, or another sample collection. A pathologist examines cells or tissue and reports findings to the treating team.
The report can help confirm the diagnosis, classify the cancer, and identify features that affect treatment planning.
Common sections
- Specimen: where the sample came from.
- Diagnosis: the pathologist's interpretation.
- Tumor type and grade: what kind of cancer and how abnormal cells look.
- Margins: whether cancer cells are seen at the edge of removed tissue.
- Lymph nodes: whether sampled nodes contain cancer.
- Special stains or biomarkers: extra tests that may guide treatment.
What to ask
- What is the exact diagnosis?
- Are margins or lymph nodes mentioned?
- Are biomarker results complete?
- Does anything in the report change stage or treatment?
- Should another pathologist review the sample?
Sources
- American Cancer Society: Understanding Your Pathology Report — Guide to common information included in pathology reports.
- NCI Fact Sheet: Pathology Reports — NCI fact sheet explaining pathology reports and diagnosis from tissue.
This guide is educational and does not replace advice from your oncology care team.