TriangleHow to read a pathology report
This is the document that actually names the cancer. A few words in it carry most of the weight.
This is not clinical evidence and not medical advice. It does not replace your care team. Discuss anything here with your clinician before you act on it. Product questions are on the FAQ.
A pathologist writes this after looking at tissue taken from you. It is the definitive diagnosis. It feeds staging and it helps plan treatment. The report usually reaches your doctor within about ten days of the biopsy or surgery, and it often lands in your portal at the same moment, before anyone has walked you through it.
Where to look first
Skip the identifying header. The useful parts, in the order they usually appear: a gross description (what the sample looked like by eye: size, weight, how many pieces, how many lymph nodes). A microscopic description (how abnormal the cells look — the grade — and whether they reached the edges of the tissue or the nodes). A final diagnosis that names the type, grade, lymph node status, margin status, and stage. Sometimes a comments section, where the pathologist flags something unusual or notes tests still pending.
Margins: the surgeon usually takes a rim of normal tissue around a tumour so the pathologist can check the edge. Negative or clean means no cancer cells at that edge. Positive or involved means cells were found there, which suggests some may remain.
Lymph nodes are called positive if they contain cancer cells and negative if they do not. For some cancers, notably breast cancer and melanoma, the surgeon removes the sentinel nodes specifically so this can be checked.
The extra reports that sit next to it
For some cancers, molecular tests are part of the initial pathology. A breast cancer report, for example, includes oestrogen and progesterone receptor status and HER2. Broader genomic or liquid-biopsy results often come as separate reports linked to this one. If you are collecting your file, look for those too. I missed one the first time because it had a different letterhead.
A second pair of eyes
You or your doctor can ask another pathologist to review the slides. You will need the slides or the paraffin block from the original lab. Many institutions, including NCI-designated cancer centres, offer this; call them first about availability, cost, and shipping. In many hospitals a tumour board — a group of specialists — also reviews all of a patient’s pathology and test results together before they settle on a plan.
If the report is already in your portal, you can also ask to talk to the pathologist who wrote it. I did not know that was allowed.
See how Triangle reads your pathology alongside your other records →
Sources
- NCI: Surgical Pathology ReportsA pathology report describes a tissue specimen, is written by a pathologist, provides the definitive diagnosis, is used for staging and treatment planning, and is typically sent to the doctor within 10 days.
- NCI: Surgical Pathology ReportsReport sections: identifying information, gross description, microscopic description (including grade, margins, lymph nodes), diagnosis, and comments.
- NCI: Surgical Pathology ReportsDefinitions of negative/clean and positive/involved margins and of positive and negative lymph nodes; sentinel nodes are removed in breast cancer and melanoma.
- NCI: Surgical Pathology ReportsSome molecular tests are part of initial pathology (e.g., ER, PR, HER2 in breast cancer); liquid biopsy and other molecular results may be in separate linked reports.
- NCI: Surgical Pathology ReportsResults often appear in the patient portal at the same time the doctor receives them; patients can ask to discuss the report with the pathologist; second opinions require slides or the paraffin block; tumour boards review all pathology and test results together.