Savi Scout System is Key in the Arsenal

"I never thought I would get cancer. I never, ever thought it was possible. It doesn't run in my family, and I didn't feel a lump," says Diana Muehlhausen, 65, of Rio Vista.

But suspicious, small lumps did show up in her left breast on her regular mammogram, so the team at Solano Diagnostic Imaging contacted Diana to return for a second and even a third image in late June.

"I didn't understand why they were calling me back to repeat it," she said, "but it definitely got my attention after they said they were referring me to a specialist."

The specialist was Jason Marengo, M.D., oncoplastic surgeon at the NorthBay Cancer Center, and he explained that Diana's lumps, although at Stage 0, were in fact a kind of cancer that had worrisome characteristics. 

She was scheduled for a lumpectomy and from this point on, Diana would now have access not only to cutting-edge technology at the NorthBay Cancer Center, but also to Dr. Marengo's specialized training in breast reconstruction and conservation techniques.Diana Muehlhausen Having him teamed with Brian Vikstrom, M.D., her oncologist/hematologist, so early in the treatment regimen is unique to cancer care, not only in Solano County, but within the greater San Francisco Bay Area and Sacramento Valley, according to Lori Muir, director of Oncology Services for NorthBay Healthcare.

"Yes, it's rare for a breast cancer patient to be seen by a plastic surgeon before they have breast conservation surgery and radiation therapy," agreed Dr. Marengo, "but that's actually when it's most critical. We have this consultation first, to map out tissue-preserving incisions, because after radiation treatments there are few options to preserve the breast with minimal contour changes. The blood supply to the breast changes after radiation and limits our ability to rearrange breast tissue to minimize contour changes after cancer removal. That's why we create an in-depth plan before surgery and radiation, for a better cosmetic outcome."

Diana also had access to a new tool in NorthBay Cancer Center's arsenal to help women prepare for their breast cancer surgery, called a Savi Scout Wire-free Radar Localization System.

This system allows Dr. Marengo to more precisely locate tumors - or tiny lumps, in Diana's case - and remove them while sparing healthy tissue and preserving the breast's most natural shape.

Diana's surgery, held in mid-August, was successful, and not only did she have the worrisome lumps removed from her left breast, as well as some lymph nodes, but Dr. Marengo also performed breast reduction surgery on her right breast so that she would have improved symmetry.

"Dr. Marengo is so dedicated to his patients that it is sometimes surprising," Diana said. "All the doctors, including Dr. Vikstrom, and their staff are so supportive, kind and helpful. They make the doctor visits not so terrible and depressing. Dr. Marengo actually gives his patients his private cell phone number so you can call or text him anytime, day or night, to ask any questions. He is that available. And if the radiologist didn't see these tiny specks, and do multiple images, then where would I be? Stage 2 or 3? If I didn't have a facility that is as caring as NorthBay Cancer Center, and if I didn't have the support of my husband, who also has a cancer history, I don't know if I would be recovering as well as I am. This is so important for the patient."

Diana also had some advice for others.

"Don't wait to have your mammogram. Just don't put it off, even if you don't feel a lump. They do them for a good reason."

New System Ends Need to Insert Wires


It's important for surgeons to find the exact location of cancerous cells that will be removed during a lumpectomy. During the surgery, surgeons are guided to the tumor by following a wire that has been inserted inside the breast during a procedure called wire localization. The wire is localized on the morning of the surgery by a radiologist. This can cause extended discomfort for the patient.

NorthBay Healthcare recently acquired the Savi Scout Wire-free Radar Localization System, and it doesn't use wires, but instead uses a small, 1 cm reflector to guide the surgeon to the lump. This reflector is inserted into the lump by a radiologist, and the surgeon locates it using a hand-held device that emits a tiny radar signal. Precision in locating the tumor may increase the probability of complete cancer removal, which also reduces the chances of needing a second surgery.

The reflector can be implanted up to 30 days before the surgery, so there is no waiting on the morning of the surgery.