Pathology dictionary

Hyperplasia

What does hyperplasia mean?

Hyperplasia is non-cancerous change that means an increased number of cells compared to normal. This change can only be seen when the tissue sample is examined under the microscope. Another word for hyperplasia is hyperplastic.

Types of hyperplasia

Hyperplasia can start anywhere in the body. In some parts of the body, this change is given a special name. The name may describe the types of cells normally found in that location, the shape of the tissue, or the look of the cells when examined under the microscope.

Common types of hyperplasia include:

Is hyperplasia a type of cancer?

Hyperplasia is not a type of cancer. However, some types are considered a pre-cancerous condition that can turn into a cancer over time.  Pre-cancerous types are usually made up of abnormal looking cells. Pathologists call these cells atypical.

Common types of hyperplasia with abnormal cells:

What causes hyperplasia?

The cause depends on the area of the body involved. For example, in the breast, endometrium, and prostate, this change is caused by long-term exposure to hormones. In the colon, this change is caused by physical stress and pressure inside the colon.

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