Papillary lesions must be removed
MANY women who have a breast tumor are told by their doctors that it's OK to leave the
lump where it is, that it's unlikely to cause a problem.
For many tumors, that's true. But one particular type of breast lump -- called a papillary lesion -- should always be surgically removed, doctors
A study in the March issue of Radiology found that papillary lesions can appear normal when biopsied using a needle but can actually be
cancerous or precancerous.
The study is one of the largest to suggest that surgery is the best approach for all papillary lesions. Previous studies have produced mixed
results on how doctors should best handle these tumors.
"With papillary lesion, it has been very , controversial," says Dr Cecilia L. Mercado, lead author of the study and an assistant
professor of radiology at New York University Medical Center. "It's been up to the
mammographer and surgeon to decide what to do."
Mercado estimates that these tumors are left alone in about half of all cases.
Papillary lesions are small collections of abnormal cells that arise in the ducts of the breast. When the lesions are near the nipple, they
sometimes produce a discharge. These lesions are usually benign, but doctors remove them anyway to stop the discharge.
Lumps in the peripheral milk ducts are less predictable, Mercado says. These lumps are usually found during mammography, and many women undergo a
needle biopsy to check for cancer. During a needle biopsy, a thin needle is inserted into the breast and a sample of the tumor cells is removed for
analysis under a microscope.
With most breast tumors, such as a more common type called adenofibroma, a needle biopsy is reliable because the tumor
contains the same type of
But the new study shows the sample taken from a papillary lesion is not always accurate. The sampled cells can be benign while other cells in the
lesion can be cancerous or precancerous.
"When we do a needle biopsy, we may only capture the benign portion," Mercado says.
In the study, Mercado looked at 42 patients diagnosed with benign papillary lesions after undergoing a core needle biopsy. Of those, 36 women
had the lesion surgically removed as part of the study to see if biopsy is reliable for this type of tumor. When the tumors were examined after
surgery, nine were found to be precancerous or cancerous.
"This is a helpful study because there has been a discussion for some time about whether papillary lesions should be removed," says
Dr Dennis Holmes, an assistant clinical professor of surgery at the University of Southern California's Keck School of Medicine. "Papillomas
aren't necessarily more prone to developing into cancer than other tumors. The problem is pathologists often have difficulty distinguishing between
a benign and malignant one."
One potential solution for women with a papillary lesion is to undergo a needle biopsy using a larger tool that can remove the entire lump for
analysis, not just a part of it, Holmes says. Papillary breast cancer is relatively uncommon -- only about 2% of all breast cancers -- and the
outlook for these cancers is good. Most women are treated and cured. But it's important to take out all papillary lesions in order to find those
cancers, Mercado says.
"Most benign breast tumours are left alone. The only reason we typically take it out is if it's suspicious," she says. "But if
I was faced with ( a papillary lesion ), I would recommend surgical excision."
Someone who was diagnosed with this type of lesion and has left it alone should follow up with regular mammograms to make sure the lesion isn't
growing, Mercado says.