The short answer
Hyperplasia is an increase in the number of normal-looking cells in a tissue. It is not cancer, though certain kinds are watched because they can slightly raise later risk.
Hyperplasia means more cells than usual in a tissue.
The cells usually still look normal under the microscope.
It is not cancer and is often harmless.
Some types, like atypical hyperplasia, are watched more closely.
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The full explanation.
More cells than usual
Hyperplasia means there is an increase in the number of cells in a tissue or organ. In most cases the extra cells still look normal under the microscope. Hyperplasia is not cancer, and it is often a harmless response to a stimulus such as a hormone.
When it is watched
Some kinds of hyperplasia get more attention. Atypical hyperplasia describes extra cells that also look somewhat abnormal. In certain tissues — such as the breast or the lining of the uterus — atypical hyperplasia can modestly raise the risk of later cancer, so doctors follow it more closely.
Hyperplasia versus dysplasia
It is easy to mix these up. Hyperplasia is mostly about the number of cells, which often still look normal. Dysplasia is about cells that look abnormal. Of the two, dysplasia is generally the more concerning finding.
What it means for you
A hyperplasia result is usually reassuring, but the exact meaning depends on where it is found and whether it is atypical. Your doctor can explain whether it simply needs monitoring or any further steps.
Words to know
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Common questions
▸Is hyperplasia cancer?
No. Hyperplasia is an increase in the number of cells in a tissue, and the cells usually still look normal. It is not cancer, though a few types are monitored.
▸What is atypical hyperplasia?
It is hyperplasia in which the extra cells also look somewhat abnormal. This type can modestly raise the risk of later cancer in some tissues, so it is followed more closely.
▸How is it different from dysplasia?
Hyperplasia is mainly about the number of cells; the cells often look normal. Dysplasia is about cells that look abnormal. Dysplasia is generally the more concerning finding.
▸Does hyperplasia need treatment?
Often not. Simple hyperplasia may just be monitored. Atypical types may prompt closer follow-up or treatment depending on the tissue involved.
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