Annual Pap tests for anal cancer don't always identify precancerous lesions, so a Mount Sinai surgeon partnered with medical device manufacturers to improve a high-resolution anoscopy device that would more effectively identify anal lesions. The new device can view cells at 38x and 59x magnification, compared to 3x or 4x magnification with a surgical scope, which researchers showed can effectively identify suspicious lesions and lead to less-invasive procedures.