Diagnosis and Medical Context
The Pope described the nodule as "circumscribed" and noted it was "detected at a very early stage and is well-localized." According to the American Cancer Society, a lung nodule is a small abnormal area measuring less than 3 centimeters (1 inch) that appears on a CT scan. These findings are often incidental and unrelated to cancer screenings.
Medical experts consulted by news outlets emphasized that such nodules are frequently benign. Dr. Nicole Geissen, a thoracic surgeon at Rush University Medical Center, stated, "Most of these, about 95/100, are not cancerous or benign in nature." Dr. Justin Karush of Northwestern Medicine added, "Lung nodules, generally speaking, are common. They are far and away not most often to be malignant."
Dr. Stephen Liu, a lung cancer expert at Georgetown’s Lombardi Comprehensive Cancer Center, explained that while benign and cancerous nodules can look similar on imaging, surgical removal provides a definitive diagnosis. "It often can be a blessing in disguise to remove that cancer before it has a chance to grow or to spread," Liu said. Dr. Dionysis Papadatos-Pastos, an oncologist at The London Clinic, noted that a "well-circumscribed nodule does suggest that this is less likely to be cancer," but stressed that ignoring such findings is not advisable.
