What Is IDC (Invasive Ductal Carcinoma)?
Invasive (or infiltrative) ductal carcinoma (IDC) is the most common type of , accounting for about 70 to 80 percent of all breast cancer diagnoses, according to the National Breast Cancer Foundation.
IDC is also the type of breast cancer that most commonly affects men.
Like ductal carcinoma in situ (DCIS), IDC begins in a milk duct of the breast.
But unlike DCIS, it spreads beyond the wall of the duct and into the fatty tissue of the breast.
From this point, the cancer may spread (metastasize) to other parts of the body through the lymphatic system and bloodstream.
Symptoms of IDC
In some cases of IDC, there are no signs or symptoms. The first sign of cancer is when a mammogram detects a suspicious mass. In other cases, the following are potential signs of invasive ductal carcinoma:
- Lump in the breast
- Thickening of the breast skin
- Rash or redness on the breast
- Swelling in one breast
- New breast pain or nipple pain
- Dimpling around the nipple or on the breast skin
- Nipple turning inward
- Nipple discharge
- Lumps in the underarm area
- Recent changes in the appearance of the nipple or breast
Diagnosis of IDC
Invasive ductal carcinoma is often discovered when a mammogram detects a cancerous mass.
If the mass is deemed to be abnormal, your doctor will most likely recommend a biopsy (removal of a small piece of tissue that is sent to a lab for analysis).
The lab will determine the type of cells involved in the breast cancer, the aggressiveness of the cancer, and whether the cancer cells have receptors that may affect your treatment options.
Treatment of IDC
Treatment for IDC is determined by the exact type of cancer and its stage.
Depending on the size and extent of the tumor, one or more of the following treatments may be recommended:
Lumpectomy:This procedure removes just the area of your breast that has cancer.
Mastectomy:This procedure removes the entirety of one or both breasts.
Axillary node dissection:If the cancer has spread to a certain lymph node or other nodes under your arms, your surgeon will probably recommend removing these nodes.
Radiation:This treatment uses high-energy rays to kill cancer cells or shrink tumors that remain in the breast, chest wall, or underarm area after surgery.
Chemotherapy:Usually administered intravenously (by IV) and given in an outpatient setting, chemotherapy drugs can be given before or after surgery, depending on your condition.
Hormone therapy:This treatment, which may be recommended to slow or stop the growth of hormone-sensitive tumors, works by interfering with the body's ability to produce or use hormones.
Biologic targeted therapy:This treatment involves drugs that alter the behavior of breast cancer cells.
Video: Invasive Ductal and Lobular Breast Cancer, Is a Combination Possible?
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