I had my follow-up with my surgeon who did the lumpectomy and sentinel lymph node biopsy. I came out of that appointment more positive than I had been after reading my pathology report right after my surgery. I thought it might be good to go over how to understand a pathology report for anyone who must have one, but first, the good things that came from my neoadjuvant targeted and chemotherapy treatment to date:
- While I did not get a pathologic complete response, my neoadjuvant chemotherapy of Taxotere, Carboplatin, Herceptin, and Perjeta (TCHP) DID kill 90% of my cancer cells, leaving only a measly, ornery 10% of live cancer cells. This is the only reason I need to have targeted chemotherapy in the form of KADCYLA, rather than just targeted therapy of Herceptin and Perjeta.
- While my tumor size does put me into stage IIA, it is only due to 0.2 cm or 2 mm. Even just a tad less and I'd be stage I. It is just a positive that I'm not on the larger side of a stage II which is up to 5 cm.
- NONE of my lymph nodes were positive which shows the TCHP stopped it in it's tracks, and kept it in my ducts.
- My overall Grade changed from a 2 to a 1. This is better explained below, but my granular/tubular and nuclear differentiation both decreased by one point making my overall histologic grade a 5 instead of a 7.
That is worth a bit of celebration!
Rather than recap some of the terms above, here is the
link to my past post about stages and grades and bears, oh my!
Here is the
link to the site describing all things pathology. I have tried to explain it in more regular terms as I would like this to be a powerful moment for anyone who has to know what the pathology report means and have the ability to ask questions about their unique situation. I would recommend taking time to read right from the link above if you are reading through your pathology report.
I think it is important to say that each pathology report can look very different, but all should have various sections that outline the findings from the samples.
From oncolink.org, you will find the following sections on a pathology report:
- Some information about you, like your health history.
- Diagnosis (suspected or known).
- The procedure that was done to get the tissue sample.
- What the tissue looks like to the naked eye (called gross description).
- What was seen under the microscope (microscopic description).
- A pathologic diagnosis (a diagnosis based on what the pathologist saw under the microscope).
For breast cancer, the report will also have:
- The type of cell the cancer comes from.
- The tumor size and grade.
- Whether cancer cells are in the lymph system or blood vessels.
- Information about surgical resection margins (the edge of the tissue that was removed).
- Hormone receptor and HER2 status.
For my pathology report, I was looking to see if each tissue sample (labeled as A, B, C, D, etc.) was positive or negative for carcinoma (cancer) and if the margins (edges of the removed tissue) were negative (all cancerous cells were removed with none remaining). They all were negative. Woo hoo!
I was also looking for the cancer type to see if it remained the same, and it did - invasive ductal carcinoma. Interesting to note, there was findings of ductal carcinoma in situ (has not yet spread to surrounding tissue) but there were negative margins, so that was all removed as well. 2% of my overall remaining cancer was in situ.
I then looked at the histologic type (type of cancer) and histologic grade (predictive of how aggressive tumor cells are). The three scores (nuclear grade, mitotic rate, and tubule formation) are then combined for a total score between 3 (1+1+1) and 9 (3+3+3). You may see the three values and total score, or just the final grade.
- Score of 3, 4 or 5: Well differentiated or low grade (Grade 1).
- Score of 6 or 7: Moderately differentiated or intermediate grade (Grade 2).
- Score of 8 or 9: Poorly differentiated or high grade (Grade 3).
Overall, the lower the grade, the less aggressive the breast cancer. Conversely, higher grades indicate a more aggressive breast cancer.
Nuclear Grade: A score is given from 1 to 3, based on what the nucleus of the cancer cells looks like compared to normal cells. In nuclear grade 1, the nucleus of the cancer cells looks more like normal cells, while in nuclear grade 3, it looks the least like normal cells.
Mitotic Rate: Describes how quickly the cancer cells are multiplying or dividing using a 1 to 3 scale: 1 being the slowest, 3 the quickest.
Glandular/Tubular Formation: This score tells you the percent of cancer cells that are formed into glandular or tubular structures consistent with normal breast tissue.
- A score of 1 means more than 75% of cells are glandular or tubular structures consistent with normal breast tissue.
- A score of 2 is between 10 and 75%.
- A score of 3 is when less than 10% of cells are glandular or tubular structures consistent with normal breast tissue.
For comparison, my pre-neoadjuvant chemotherapy histologic grade was a 7. Nuclear grade and Glandular/Tubular formation were both a 3 and Mitotic rate was a 1. Post-neoadjuvant chemotherapy, my histologic grade was a 5. Nuclear grade and Glandular/Tubular formation both decreased to 2 and Mitotic rate stayed a 1. This shows the impact that TCHP had on my cancer cells.
My hormone receptor and HER2 status stayed the same. Triple positive. This was not expected to change, but I finally found a good visual to share.
Clinical (pre-treatment):
cT2N0M0
Pathologic (post-treatment and surgery):
ypT2N0M0