Only 15,400 Massachusetts General Brigham patients underwent cancer screenings during the first peak of the COVID-19 pandemic between March and June 2020, compared with 64,269 patients during the previous quarter, which may have resulted in nearly 1,400 missed cancers and precancerous lesions, according to a research letter in JAMA Oncology. However, researchers found that the number of cancer screenings rose to about 52,000 during the quarter after the pandemic's initial peak.