Remission means the signs and symptoms of a disease have decreased significantly or disappeared entirely. It does not mean cured. The term is used across many conditions, from cancer to diabetes to depression, and the specific definition shifts depending on the disease. Understanding what type of remission you or someone you know is in tells you a lot about what to expect going forward.
Complete vs. Partial Remission
The most important distinction is between complete and partial remission. In complete remission, all detectable signs and symptoms of the disease are gone. Physical exams, blood work, and imaging scans show no evidence of disease. In partial remission, the disease is still present but has shrunk or improved substantially. For cancer, partial remission typically means tumors are at least 50% smaller than before treatment and don’t appear to be growing.
Complete remission sounds like a cure, but it isn’t. The National Cancer Institute is careful to note that even in complete remission, disease may still exist in the body at levels too small for current tests to detect. Memorial Sloan Kettering Cancer Center points out that “cure” isn’t really a medical term at all. Doctors prefer phrases like “no evidence of disease” or “complete remission” because they acknowledge what testing can and can’t see.
What Remission Looks Like in Cancer
Cancer is probably the condition most people associate with the word remission. When an oncologist says your cancer is in remission, they’re describing what the tests show right now, not making a permanent prediction. Complete remission means scans are clear, bloodwork is normal, and no cancer can be found anywhere. Partial remission means measurable improvement, with tumors shrinking by half or more and cancer cells declining in the blood (in blood cancers like leukemia or lymphoma).
Staying in remission often requires ongoing treatment. Maintenance therapy, which uses lower doses of medication over an extended period, is common in blood cancers and some solid tumors. The goal is to suppress any remaining disease cells and extend the time before a possible relapse. Some people stay on maintenance treatment for months or years after achieving remission.
Monitoring during remission varies. For some cancers, routine PET/CT scans in patients without symptoms turned out to be expensive without meaningfully changing outcomes. Current guidelines for conditions like Hodgkin lymphoma have moved away from frequent imaging in asymptomatic patients, relying instead on regular check-ups and blood tests. Newer approaches like circulating tumor DNA testing (a blood test that looks for tiny fragments of cancer genetic material) are being studied as potentially more precise ways to catch a relapse early.
Remission in Type 2 Diabetes
Remission isn’t just a cancer term. People with type 2 diabetes can achieve remission by bringing their blood sugar levels back to normal without medication. An international expert consensus defines diabetes remission as maintaining an HbA1c level below 6.5% for at least three months after stopping all diabetes medication. HbA1c reflects your average blood sugar over roughly three months, so this threshold means your body is regulating glucose on its own.
This can happen through significant weight loss, dietary changes, or bariatric surgery. It doesn’t mean diabetes is gone forever. The underlying tendency toward insulin resistance can reassert itself, which is why ongoing monitoring remains important even after achieving remission.
Remission in Depression
In mental health, remission has its own specific meaning. For major depression, remission means a period of at least two weeks with no or very few depressive symptoms. Full remission requires two months free of major depressive signs. If you’ve used a PHQ-9 questionnaire (the standard screening tool many doctors use), remission corresponds to a score below 5 out of 27, which reflects minimal or no symptoms.
This distinction matters because “feeling better” and “being in remission” aren’t the same thing. Someone who improves from severe depression to mild depression has responded to treatment, but they haven’t reached remission. The goal of depression treatment is full remission, because people who achieve it have a substantially lower risk of relapse than those who only partially improve.
Remission in Autoimmune Conditions
Rheumatoid arthritis offers a good example of how precisely remission can be defined. Rheumatology guidelines use a checklist approach: to qualify for remission, your tender joint count, swollen joint count, a blood marker of inflammation, and your own rating of disease activity all need to fall to very low levels (each scoring 1 or below on their respective scales). If any one of those is still elevated, you don’t meet the formal criteria.
For people living with rheumatoid arthritis, remission means joints that aren’t swollen, pain that’s minimal, and blood tests that don’t show active inflammation. Many people reach this state through medication and stay on treatment to maintain it. Others cycle in and out of remission over time, with flares triggered by stress, illness, or medication changes.
Spontaneous Remission
Rarely, disease retreats without any treatment at all. Spontaneous remission in cancer is real but extraordinarily uncommon, occurring in roughly 1 in 60,000 to 100,000 cases. Certain cancers have slightly higher rates: for one type of blood cancer (multiple myeloma), it’s about 1 in 400.
Researchers believe the immune system is the primary driver in most cases. Infections that cause fever appear to trigger immune activation strong enough to attack tumor cells. Biopsy procedures may also play a role by disrupting blood supply to a tumor or releasing tumor proteins that prime the immune system to fight the cancer. These cases are medically fascinating but far too rare to count on.
Why the Word Matters
The language your doctor uses tells you something specific. “Remission” means the disease is under control or undetectable right now. It carries hope, but it also carries honesty: the condition could return. That’s not pessimism. It’s the reason for follow-up appointments, maintenance medications, and ongoing monitoring. Knowing what type of remission you’re in, whether it’s complete or partial, and what your specific condition’s benchmarks are gives you a clearer picture of where you stand and what the path ahead looks like.