Stage-zero cases accounted for 4 percent of diagnoses in 2025, while the share detected at stage I rose to 36 percent over the past decade, according to figures cited by Vedomosti.
Breast cancer was diagnosed in 86,705 women in Russia in 2025, accounting for 19 percent of all malignant neoplasms in the country, Sergei Prokopenko of the Herzen National Medical Research Center for Obstetrics, Gynecology and Perinatology said at a roundtable. The remarks were reported by Vedomosti.
Data from a national collection on cancer care show that about 3,700 cases were detected at stage zero in 2025, or roughly 4 percent. The comparable share was close to 3 percent in 2015. The proportion of breast cancers diagnosed at stage I rose to 36 percent over the same decade, mammologist Sergei Malygin said.
Malygin said detection at stages III and IV fell by 23 percent over the 10-year period. These later stages accounted for just over 23 percent of cases in 2025.
Prokopenko said treatment of advanced breast cancer accounts for about 40 percent of spending on care for the disease. Overall, breast cancer treatment takes 14 to 16 percent of health-care budget spending, the largest share among malignant tumor types, he said.