A failure to properly screen thousands of women for cervical cancer is equivalent to their exposure to a toxic material, the Pennsylvania Supreme Court heard Monday during oral arguments in Pittsburgh over the viability of a class action claim for medical monitoring.

In Walter v. Magee-Womens Hospital, the Superior Court affirmed a trial court ruling that the plaintiffs failed to state a claim for medical monitoring based on allegations that the Pittsburgh hospital had used under-qualified technicians to review their Pap smears rather than board certified pathologists.