Conclusions
In conclusion, we reported the case of a patient with advanced breast cancer who failed to receive comprehensive care despite regular video conferencing with her physician during the COVID-19 pandemic, resulting in delayed detection of liver metastasis. Therefore, inter-hospital collaboration is required to provide uninterrupted cancer care to patients who are disproportionately affected by crises, and such collaborations are crucial for safe and efficient practice of telemedicine for cancer patients during the COVID-19 pandemic.