sir, my cousin 15 yr old is facing some health problems .now she is hospatelised.now her blood count is 6,so they r giving blood.after testing her blood the dr said that in blood lymphocyte count is high..sheis little fatty  .thats y am asking this question...pls explain me..is lymphocytosis is a cancer?or do lymphocytosis leads to cancer?
Thanks for your question on Chat Doctor. I can understand your cousins situation and problem. Your cousin is having low hemoglobin and high lymphocytes. This is seen in blood cancer like leukemia and lymphoma. Other causes for high lymphocytes are 1.  Viral infection 2. Chronic infection like tuberculosis or fungal infection. So to differentiate between all these, I advise to go for bone marrow biopsy. In bone marrow biopsy, if blasts are seen than possibility of blood cancer is high. So consult hematologist and discuss all these.