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These delayed effects can include serious problems such as memory loss, stroke-like symptoms, and poor brain function. You may also have an increased risk of having another tumor in the area, although this is not common.

Radiation after Lumpectomy A course of radiation starts between six and 12 weeks after lumpectomy surgery. Most frequently, we target the entire breast (whole-breast radiation). In some cases, we also treat nearby lymph nodes.

Radiation therapy can be given after other kinds of treatments to destroy any remaining cancer cells. This is called "adjuvant radiation therapy." To relieve symptoms. Radiation therapy can be used to relieve the signs and symptoms of cancer.

Missed Radiation Therapy Sessions Increase Risk of Cancer Recurrence. Patients who miss radiation therapy sessions during cancer treatment have an increased risk of their disease returning, even if they eventually complete their course of radiation treatment, ing to a new study.

What you can expect. Radiation therapy usually begins three to eight weeks after surgery unless chemotherapy is planned.

You generally start it about 4 to 6 weeks after surgery. If you need to have chemotherapy you have this before your radiotherapy. People with a very low risk of the cancer coming back may only have part of the breast treated with radiotherapy.

Over an average follow-up of five years, the study revealed that the rate of breast cancer recurrence in the same breast was 2.3% in women who skipped radiation after lumpectomy and took endocrine blockers instead — the same rate expected with radiation use, which was impressive, Dr. Tung says.

Try not to worry if you have to wait. Researchers have found that waiting up to 7 months to start radiation therapy after surgery (and after chemotherapy has already been given) doesn't increase the risk that the cancer will come back in the breast tissue (called a local recurrence).