How to read a pathology report
A pathology report is the result of examining a tissue sample under a microscope, and it forms the basis of the diagnosis. It contains technical information such as the tumor type, its grade, spread/invasion and the surgical margin. These terms can be confusing; the best approach is to go over the report together with your doctor rather than interpreting it on your own. This article helps you recognize the terms that come up often — but it does not replace a personal interpretation.
When you are handed a pathology report, the terms in it can seem unfamiliar and worrying. The aim of this article is not to help you diagnose yourself from that report; it is to introduce the terms that come up often, so that you can understand the process and talk with your doctor more comfortably. The real interpretation of your report always belongs to the doctor who is assessing you.
First, know this: a single term can be misleading when it is taken out of the context of the whole report. This page is a "glossary"; it does not replace a personal interpretation. Always go over your report with your doctor.
What is a pathology report?
A pathology report is the written result of examining a tissue sample under a microscope, taken by biopsy or surgery. A cancer diagnosis and many treatment decisions rely heavily on this report — which is why it is considered the basis of the diagnosis.
The parts of the report
A pathology report usually includes the following information:
- Specimen information: which tissue was taken and how,
- Gross/microscopic description: the appearance of the sample and the findings under the microscope,
- Diagnosis: the type of tumor (if any),
- Additional information: grade, spread/invasion, surgical margin and, if needed, the results of special staining (immunohistochemistry).
Common terms
| Term | Plain meaning |
|---|---|
| Benign | Not cancerous |
| Malignant | Cancerous |
| In situ | A change confined to the surface that has not yet spread |
| Invasive | Showing spread into the surrounding tissue |
| Grade | How closely the cells resemble normal cells |
| Surgical margin | Whether there is tumor at the edge of the removed tissue |
| Immunohistochemistry | Special staining tests that clarify the tumor type |
For cytology terms related to the cervix/HPV (ASC-US, LSIL, HSIL, CIN), see also: HPV results glossary.
Grade vs. stage
These two are often confused, but they are different:
How closely the tumor cells resemble normal cells under the microscope. It appears in the pathology report.
How far the cancer has spread in the body. It is determined by examination, imaging and sometimes surgery → diagnosis and staging.
What should I do with my report?
- Keep your report and any images together,
- Rather than interpreting the terms yourself, go over them together with your doctor,
- Don't hesitate to ask about any wording you don't understand — this is your right,
- If a major decision is involved, these documents will also be useful for a second opinion → second opinion.
A pathology report is not a puzzle to be feared; it is the key to building the most suitable plan for you. The person who will read it correctly is the doctor who is assessing you.
Frequently asked questions
Can I interpret my pathology report myself?
It is recommended that you don't. The report is a technical document, and a single term can be misunderstood when it is taken out of context. Take your report to the doctor who will go over it with you.
What do 'benign' and 'malignant' mean?
Benign means 'not cancerous', while malignant means 'cancerous'. Even these terms in the report should be assessed together with the other findings.
What is the difference between 'in situ' and 'invasive'?
In situ means the change is confined to the surface and has not yet spread into neighboring tissue; invasive means it shows spread into the surrounding tissue. This distinction affects the treatment plan.
Is a high grade bad?
The grade shows how differentiated the cells are (how closely they resemble normal cells). A high grade may point to a tendency to grow faster, but it does not determine the outcome on its own; it is assessed together with the stage and other factors.
What does 'negative surgical margin' mean?
It usually means that no tumor was seen at the edges of the removed tissue; this is a desired finding. It is still interpreted as part of the whole picture, and your doctor will explain it.
Sources
Note: This content was written independently, based on current scientific information published by the institutions above; it is not a direct copy of any text.
This article is for general information only; it is not a diagnosis or treatment recommendation and does not replace a medical examination. Please consult your doctor about your own situation. The content reflects scientific knowledge as of the update date above.