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Published on October 08, 2025

Conditions That May Be Mistaken for Breast Cancer 

If you notice something in your breast that looks or feels different, it’s natural to be worried. Breast cancer may easily be a first thought, and that’s a valid concern, but thankfully not every lump means cancer. Many breast changes are harmless, but since it’s hard to know what’s potentially problematic and what isn’t, it’s important to get anything unusual you see or feel checked out. 

If you notice changes in your breasts of any kind, see your doctor to determine the next step. Get a professional, clinical opinion about what may be going on (instead of checking Dr. Google to try to figure it out on your own). Your doctor will order any tests that may be needed to confirm a diagnosis. This will give you peace of mind if it turns out to be nothing concerning. If it’s something serious, catching it early when treatment is usually most effective is the best thing you can do for your health. 

photo of a woman feeling around her breast to check for lumps

Here are some breast conditions that may look or feel similar to breast cancer and are not cancerous: 

  • Fibrocystic breast changes – Natural changes that make breast tissue feel lumpy or rope-like. They can be tender, especially before your period.
  • Cysts – Smooth, fluid-filled sacs that feel soft or rubbery. They can come and go and usually aren’t harmful. 
  • Fibroadenomas – Firm, moveable lumps that are often found in younger women. They’re made of normal breast tissue that’s grown together.
  • Fat necrosis or oil cysts – Firm lumps that are harmless and can appear after an injury or surgery to the breast.
  • Duct ectasia – When a milk duct under the nipple becomes blocked or widened. They can sometimes cause nipple changes or discharge.
  • Microcalcifications – Tiny calcium spots that show up on a mammogram. Most are harmless, but your doctor may order additional imaging to be sure.
  • Mild hyperplasia – A small overgrowth of breast cells that isn’t cancer, though certain types can slightly increase future risk.
  • Breast infections or inflammation – Redness, swelling or tenderness that may be caused by infections such as mastitis or small abscesses. 
  • Pseudoangiomatous stromal hyperplasia (PASH) – A non-cancerous overgrowth of connective tissue that may appear as a lump on imaging tests. 

Why You Should Get Breast Changes Checked 

PIH Health Obstetrics & Gynecology specialist, Nina Hooshvar MD, says, “Breast cancer and non-cancerous conditions can look and feel similar, so it’s impossible to tell the difference without a doctor’s expertise or imaging tests.” She also says, “It’s important to know what’s normal for you, do routine self-checks, see your doctor regularly and follow mammogram guidelines.”  

If you notice a new lump, a change in size or shape of an existing lump, skin dimpling, nipple discharge, or anything else unusual, call your healthcare provider. Even if it turns out to be nothing serious, you’ll feel better knowing exactly what it is. Since there’s no easy way to know for sure what might be a sign of cancer, regular check-ups and mammograms are the best way to keep yourself healthier. 

To learn more, visit PIHHealth.org/WomensHealth.  

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Nina Hooshvar MD

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