Advanced Stage Breast Cancer on Initial Presentation Following One Year Hiatus in Screening Mammography Due to COVID-19 Pandemic.

Breast cancer is the second most common cancer and second leading cause of cancer death affecting women in the U.S., behind only skin and lung cancers, respectively. Modern screening mammography methods have contributed, in part, to a 40 percent decrease in breast cancer mortality since it was introduced in 1976. Therefore, regular breast cancer screening is vital to women's health. The COVID-19 Pandemic posed many challenges to healthcare systems worldwide. One challenge was the discontinuation of routine screening tests. We present a female patient who consistently participated in annual screening mammography and was confirmed negative for malignancy between 2014 and 2019. She did not get her mammogram in 2020 due to the COVID-19 pandemic and was subsequently diagnosed with stage IIIB breast cancer when she resumed her screening mammogram in 2021. This case illustrates one of the consequences of delayed breast cancer screening.