Primary clear cell adenocarcinoma of the vagina not associated with diethylstilbestrol metastasizing to the lung: a case report

Primary clear cell carcinoma of the vagina (PCCAV) is a rare form of vaginal cancer that typically affects young women with a history of prenatal exposure to DES. However, data on non-DES PCCAV cases are limited. This report describes a case of PCCAV in a 47-year-old patient who presented with post-coital bleeding and was diagnosed with clear cell adenocarcinoma via biopsy and MRI. The patient had no history of DES exposure and further testing showed no signs of metastasis, leading to surgery and chemotherapy. Four years later, the patient presented with dyspnea, and a chest CT scan revealed a lung nodule, later confirmed to be a metastasis of clear cell adenocarcinoma from the vaginal cancer. The patient passed away a month later due to complications from COVID-19.