The short answer
Dysplasia means cells look abnormal under the microscope but are not cancer. It can be low or high grade, and high-grade dysplasia is watched or treated because it may progress.
Dysplasia means abnormal-looking cells that are not cancer.
It is graded as low or high, based on how abnormal the cells look.
Low-grade dysplasia often stays stable or reverses.
High-grade dysplasia is more likely to progress and may be treated.
Choose how you want to understand this
The full explanation.
Abnormal, but not cancer
Dysplasia means that cells look abnormal under the microscope but are not cancer. It is sometimes called a precancerous change, because in some cases dysplasia can progress toward cancer over time — though many cases never do.
Low grade and high grade
Pathologists grade dysplasia by how abnormal the cells look. Low-grade dysplasia is only mildly abnormal and often stays stable or even reverses on its own. High-grade dysplasia looks more abnormal and carries a higher chance of progressing, so it is watched closely or treated.
Why it is watched
Because dysplasia sits between normal and cancerous, it is a signal to keep an eye on the area. Finding and treating high-grade dysplasia is one way cancer can sometimes be prevented before it starts — for example, through cervical or colon screening.
What happens next
Management depends on the grade and the location. It may mean repeat tests over time, or removing the abnormal area. A dysplasia result is a reason for follow-up, not cause for panic, and your doctor can explain the specific plan.
Words to know
Tap any term to see what it means.
Common questions
▸Is dysplasia cancer?
No. Dysplasia describes cells that look abnormal but are not cancer. It is sometimes called a precancerous change because some cases can progress over time.
▸What does low-grade versus high-grade mean?
Low-grade dysplasia looks only mildly abnormal and often stays stable or improves. High-grade dysplasia looks more abnormal and is more likely to progress, so it is watched or treated.
▸Will dysplasia turn into cancer?
Not necessarily. Many cases never become cancer, especially low-grade ones. High-grade dysplasia carries more risk, which is why it prompts closer follow-up.
▸How is it managed?
Management ranges from monitoring with repeat tests to removing the abnormal area, depending on the grade and location. Your doctor can explain the plan.
How this page was created
Cancer Explained uses AI to organize and translate information from the authoritative sources cited on each page. Automated checks review claims, citations, clarity, duplication, and potential safety concerns before publication. Our content is not currently reviewed by physicians unless a specific qualified reviewer is named on the page. Cancer Explained provides general education and should not replace advice from your healthcare team.
Human medical review: not completed. At this time, most Cancer Explained content has not been reviewed by a physician or other healthcare professional. Pages with documented human medical review identify the reviewer, credentials, and review date directly.
Read more about our editorial process, our use of AI, and our corrections policy.
Spotted a problem? Report an error — a factual mistake, broken or outdated source, confusing wording, or anything that seems unsafe. Please do not include names, medical record numbers, dates of birth, addresses, or other identifying medical information in your report.
After using this page, do you understand what to do next?
Anonymous — we only record the answer, never who gave it.