If you landed here because you or someone you love has been diagnosed with lobular breast cancer, you are not alone. This is a gentle place to take a breath, learn what questions to ask next, and feel supported as you sort through what comes after “the diagnosis.”
My name is Leslie Ferris Yerger, and I was diagnosed with Stage IV invasive lobular breast cancer (ILC) de novo—meaning my first diagnosis was already metastatic. Lobular breast cancer is sometimes called “sneaky,” because it can be difficult to see on standard imaging and doesn’t always behave like other breast cancers.
I was diagnosed with Stage IV lobular breast cancer de novo, meaning there wasn’t an earlier stage diagnosis before metastasis was found. This is not uncommon with lobular breast cancer because it can be notoriously difficult to detect on imaging like mammograms—and even ultrasound—especially when it grows in a subtle pattern rather than forming a clear lump.
Lobular cancer is often described as “sneaky” not to scare anyone—but to explain a real challenge: it can blend into surrounding tissue, making it harder to spot early.
Lobular breast cancer makes up about 10–15% of breast cancers, and the more we talk about it, the more we help people understand what to watch for and what to ask their doctors.
De novo metastatic breast cancer means breast cancer has already spread to a distant part of the body by the time it is first diagnosed. It is Stage IV at first diagnosis—without a previous early-stage diagnosis.
If this is your situation, it can feel like the ground moved beneath your feet. Please know this: while Stage IV breast cancer is typically described as treatable rather than curable, many people live meaningful, connected lives while receiving ongoing care. (You deserve support for both your body and your heart.)
One reason ILC can be missed is how it grows. Instead of forming a single obvious mass, lobular cancer may grow in lines, strands, or a web-like pattern, which can make it less visible on imaging and less noticeable on self-exam.
ILC can also spread in patterns that are sometimes described as “unusual,” including spread to parts of the gastrointestinal tract and the lining of the abdomen (peritoneum), among other sites—one reason it can be complex to diagnose and monitor.
Helpful Learn Look Locate next steps (internal links to add):
If you’re newly diagnosed—especially with Stage IV—information overload is real. A few steadying steps that can help:
These are practical, patient-centered questions you can copy into your notes:
Add a short resource block with 4–6 links max:
Q1. Is lobular breast cancer common?
A: Yes. Invasive lobular carcinoma (ILC) is often reported as about 10–15% of breast cancers.
Q2. Why is lobular breast cancer called “sneaky”?
A: Because it may not form a distinct lump and can be harder to see on imaging due to its growth pattern.
Q3.What does “de novo” Stage IV mean?
A: It means the first diagnosis is already metastatic—cancer has spread beyond the breast at the time it’s first found.
Q4. Can lobular breast cancer spread to unusual places?
A: It can. ILC may spread to common sites like bone, liver, and lung, but it is also associated with spread to sites like the gastrointestinal tract and peritoneum in some cases.
Q6. What should I do if my scans are confusing or symptoms don’t match imaging?
A: Tell your care team clearly what you’re feeling and ask how they want you to report changes. It’s appropriate to ask whether different imaging approaches are needed, depending on your situation.
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