Atypical squamous cells (ASC) are abnormal cells found on a
Pap test, but the reason for the abnormalities is not
known. The causes of ASC include infection and inflammation.
ASC is further classified as:
ASC of undetermined significance
ASC but cannot exclude
high-grade squamous intraepithelial lesion (HSIL)
When a woman has ASC-US abnormalities, her health professional will
watchful waiting or
human papillomavirus (HPV) testing. ASC-H
abnormalities have a higher risk of being identified as more severe changes and
are evaluated with colposcopy.
How this information was developed to help you make better health decisions.