Differential Cd200 expression was observed across distinct structures within the mammary gland tissue, Many literature have identified Cd200, an immunosuppressive molecule [50,51,52], as a surface marker of tumor stem cells in various cancer types, including basal cell carcinoma, leukemia, and head and neck squamous cell carcinoma [53,54,55]. The gene discussed is CD200; the disease is basal cell carcinoma.