Chronic lymphocytic leukemia (CLL) and prolymphocytic leukemia (PLL) are types of blood cancer. They develop in types of white blood cells called B cells or T cells, or the precursors to these cells.

Sjögren disease, which is an autoimmune condition, may increase a person’s risk of developing non-Hodgkin’s lymphoma (NHL). NHL is a type of cancer that starts in white blood cells — lymphocytes — and ...

Dear Dr. Roach: I’m 71 years old. In 2021, lymphocytosis was found during my pre-op workup for breast cancer. I had a successful lumpectomy and radiation, and I am on a five-year course of anastrozole ...

A male in his 50s presented with profound leucocytosis, systemic symptoms and marked hepatosplenomegaly. Initial workup with peripheral blood flow cytometry suggested T-cell prolymphocytic leukaemia ...