What does the scientist called a "cytologist" do?

A cytologist studies cells, examining their structure, behavior, and possible abnormalities.

The word comes from cytology, the scientific study of cells. Cytologists may use microscopes, cell cultures, staining techniques, and other laboratory methods to investigate how cells are organized and how they function. Because every living organism is made from cells, cytology is important across biology, medicine, and genetics.

In healthcare, the term often refers to specialists who examine individual cells or small groups of cells for signs of disease. Cytology can help identify cancerous or precancerous changes, infections, and inflammation. A familiar example is the Pap test, in which cells from the cervix are collected and examined.

Cytology is not exactly the same as histology. Cytology focuses mainly on individual cells or loose cell samples, while histology studies whole tissues and the way cells are arranged together. “Cytologist” therefore describes a cell specialist, although clinical cytologists often work specifically in diagnostic pathology.