Furthermore, first studies in patient samples point to a correlation between high CD73 expression and poor prognosis in cancer, e.g., in non-small cell lung cancer (NSCLC), triple negative breast cancer, high grade serous ovarian cancer, head and neck squamous cell carcinoma (HNSCC) [301,302,303,304,305]. Here, NT5E is linked to ovarian serous adenocarcinoma.