Sunday, June 19, 2016

Clinical Corner: IDC vs. DCIS

Question: What is the difference between IDC and DCIS?


Answer: Invasive Ductal Carcinoma, or IDC, makes up 70-80% of all breast cancer diagnoses. IDC is sometimes referred to as Infiltrating Ductal Carcinoma. IDC means that the cancer cells that began forming in the milk ducts or lobules have spread to surrounding breast tissue. IDC is considered a type of invasive breast cancer.

Ductal Carcinoma In Situ (DCIS) is different than IDC. DCIS means that the cancer cells are still contained in the lining of the milk ducts and have not spread. DCIS is non-invasive breast cancer and is considered the earliest stage of breast cancer. DCIS is sometimes reported as intraductal carcinoma. Once DCIS moves out of the ducts into other areas of the breast, it is considered IDC or invasive breast cancer.

Ductal Carcinoma In Situ (DCIS) is frequently entered incorrectly as a final diagnosis in eCaST, when in fact the final diagnosis on the pathology report is Invasive Ductal Carcinoma (IDC). IDC should be entered in eCaST as Invasive Breast Cancer. When a patient is diagnosed with both IDC and DCIS, the CDC has requested that the worst reported diagnosis be entered in eCaST. In cases where DCIS and IDC are both reported, you’ll need to enter Invasive Breast Cancer as the final diagnosis in eCaST.

If you have a clinical question that you would like answered, please email Angela.FellersLeMire@state.co.us.

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