Cytogenetics

Cytogenetics testing looks for changes in the chromosomes in cells, such as translocations (when part of a chromosome breaks off one chromosome and attaches to a second) and other abnormalities. Pathologists use these abnormalities to help classify the type of cancer. Before the pathologist can view the chromosomes under a microscope, the cells must be given time to grow in lab dishes. For this reason, cytogenetics testing may take two to three weeks to yield results.