Lymphangitic Carcinomatosis of Possible Urothelial Origin.

Urothelial cancer with lymphangitic carcinomatosis is a rare clinical phenomenon that is not commonly associated with acute respiratory failure. However, the recent prevalence of COVID-19 may predispose a patient's respiratory system to become more susceptible to metastatic lymphangitic spread. We present a case of a 57-year-old male with progressively worsening hypoxic respiratory failure after testing positive for COVID-19 six months prior. Imaging during the hospitalization showed adenopathy consistent with lymphangitic carcinomatosis that was not present six months prior. Acute respiratory deterioration is associated more commonly with infection rather than the progression of cancer, but infectious, autoimmune, and cardiac processes were deemed minimal contributory factors. The patient's respiratory decline only allowed for a T-11 vertebral biopsy which showed poorly differentiated metastatic carcinoma of possible urothelial origin. Urothelial cancer leading to respiratory failure due to lymphangitic carcinomatosis is an uncommon phenomenon, but in the setting of prior COVID-19, it may make the respiratory system more susceptible to lymphangitic spread. However, research is limited due to the recent prevalence of COVID-19, and more research is necessary to investigate a potential correlation with rapid lymphatic carcinomatosis after COVID-19 infection.