Watch and wait isn’t an approach doctors recommend for all early-stage cancers. But for several tumor types, research has shown that early treatment doesn’t boost survival over watchful waiting. Patients whose doctors may recommend this approach include those with certain early, slow-growing or stable versions of prostate cancer, breast cancer (in its early stage, also known as ductal carcinoma in situ, or DCIS), thyroid cancer and certain types of blood cancers. (Watch-and-wait is more controversial for some cancers than for others, and it’s also debated whether some early-stage cancers, such as those of the thyroid, even classify as cancer at all.)
For most cancers, there are standardized guidelines for when doctors recommend active surveillance, said Dr. Stephen Smith, an oncologist at Seattle Cancer Care Alliance who specializes in lymphoma. But he recognizes that it can be stressful for patients to be told they have cancer in the same breath as a recommendation against immediate treatment.
“It’s very understandable to want to treat a cancer in your body,” said Smith, who is also a clinical researcher at Fred Hutchinson Cancer Research Center. In such situations, his patients often ask questions like “‘I know this is here, why aren’t we treating it?’ ‘Won’t it just get worse?’ or, ‘What are we watching and waiting for? Because I don’t want that to happen,’” he said.
Doctors can’t answer many of those questions in a quick, routine appointment.
“You have to have time to have this conversation,” Smith said. “This is a nuanced and important conversation.”
The evidence behind watch and wait
Patients whose doctors recommend watch and wait can feel reassured, though, that they are not in any immediate danger by choosing to delay treatment. That goes back to the tumors’ slow growth, also known as indolence, Smith said. Based on extensive evidence from past studies, researchers know that certain slow-growing tumors aren’t going to suddenly change their nature, at least not on the timescale of the recommended surveillance schedule.
For example, a large study published last month that followed more than 1,600 men with early-stage prostate cancer found that those being actively monitored were no more likely to die of their disease in the 10 years following their diagnosis than those who had their prostates removed surgically or who underwent radiation. And researchers studying indolent lymphomas have likewise found that early treatment with chemotherapy and radiation does not boost survival over watchful waiting.
How “active” a patient’s active surveillance is depends in part on the type of cancer. Patients with watch-and-wait prostate cancer, like Roosevelt, often undergo regular biopsies, imaging and PSA tests. Those with early-stage chronic lymphocytic leukemia, or CLL, can be monitored with a simple blood test. Those with follicular lymphoma — a form of non-Hodgkin lymphoma that is the most common type of watch-and-wait blood cancer — get regular CT scans, although a monitoring blood test for this disease, too, may be on the horizon, Smith said.
Watch and wait also doesn’t mean missing a “window” for a cure — there’s no evidence that these slow-growing blood cancers are more likely to be cured with early treatment, Smith said. And some rare watch-and-wait patients even go into spontaneous remission without treatment.
Not every patient can accept the idea of doing nothing for their cancer, Smith said, and he and his colleagues work with their patients to reach an approach that, as much as possible, is acceptable for both parties. Smith pointed to a recent study that compared watch and wait with Rituximab, an antibody treatment for blood cancers, in patients with slow-growing non-Hodgkin lymphoma. The patients who received Rituximab were better able to cope with and adjust to their disease, and they were able to put off starting chemotherapy for longer than the patients assigned to watchful waiting — although, again, there was no difference in survival between the groups.