Your breast cancer pathology report: what to look for and what to ask

The short answer

A pathology report describes tissue examined after a biopsy or surgery and gives the diagnosis. Not every field appears in the first report, and its meaning depends on the specimen type. The safest way to use it is to identify the conclusion, note what is still pending, and list what the care team needs to explain.

Check your name, the date, which breast and area the tissue came from, and whether the document describes a biopsy, surgical specimen, lymph nodes, or other material. A small biopsy cannot always provide the same information as a report produced after surgery.

The diagnosis section summarizes what the pathologist found. It may include:

• the histologic type, such as ductal or lobular;
• whether it is in situ or invasive;
• the size found in the specimen, when it can be measured;
• other relevant microscopic features.

Do not reduce the conclusion to one word. Copy the full wording for your discussion with the doctor.

Grade describes how different the tumor cells and tissue look from normal tissue and provides information about their likely behavior. It is not the same as stage, which describes how far the disease has spread.

After surgery, the report may state whether tumor cells were found at the edge of the removed tissue. A negative margin means no cells were identified at the edge; a positive margin means cells were identified there. The next decision does not come from this label alone. It also depends on location, distance, the operation performed, and the team's discussion.

For lymph nodes, the report may state how many were examined and how many contained tumor cells. Ask what this means for staging and whether it changes the plan.

These tests are performed on tumor tissue and help with classification and treatment planning. Results may appear in the main report or a separate document. Record the values, method, and whether each result is final.

Some additional tests take longer. A report may later receive an addendum. A missing field does not automatically mean it was not tested; ask whether it is not relevant, was not performed, or is still pending.

• Is this the final report, or is an addendum expected?
• What is the complete diagnosis in plain language?
• Which information comes from the biopsy and which from surgery?
• What does the grade mean in this case?
• Are margins relevant for this specimen?
• How many lymph nodes were examined, and what does the result change?
• Are ER, PR, and HER2 final?
• Would a second pathology opinion be useful?

Mark three things in the document: the conclusion, the fields that are still pending, and your questions. Ask the team to connect the report with the stage and treatment plan. Do not use one result to estimate your prognosis on your own.