On occasion you may see a report from a Pap test or tissue biopsy stating "atypical cells present." This might cause you to worry that this means cancer, but atypical cells aren't necessarily cancerous. Many factors can make normal cells appear atypical, including inflammation and infection. Even ...
Atypical teratoid rhabdoid tumor (ATRT) is a rare, fast-growing brain or spinal tumor in children. Learn about its symptoms and treatment.
Diagnosis Atypical hyperplasia of the breast is most often diagnosed during a breast biopsy. A breast biopsy is a procedure to remove a sample of breast tissue for testing. It's often done if something concerning is found during a clinical breast exam or on an imaging test, such as a mammogram or an ultrasound.
Atypical genitalia, formerly called ambiguous genitalia, is a rare condition in which an infant's genitals don't appear to be clearly male or female on the outside.
Atypical antidepressants ease depression by affecting chemical messengers (neurotransmitters) used to communicate between brain cells. Like most antidepressants, atypical antidepressants work by ultimately effecting changes in brain chemistry and communication in brain nerve cell circuitry known to regulate mood, to help relieve depression.
Atypical squamous cells of undetermined significance, also called ASC-US. Squamous cells are thin and flat and grow on the surface of a healthy cervix. This result means that the Pap test found squamous cells that look different than healthy cells. But the cells don't look like precancerous cells. These cells are often a sign of HPV infection.
Learn how a diagnosis of atypical lobular hyperplasia or atypical ductal hyperplasia affects your risk of breast cancer and what you can do.