This book is the culmination of a major three and half-years' work on B-chronic lymphocytic leukaemia (B-CLL) to stratify its prognostication. It represents a comprehensive analysis of various prognostic factors in adult B-CLL patients. The book is a fantastic resource and could be used by a range of professionals. Its main focus is on the laboratory diagnosis of B-CLL using basic methods as well as flow cytometry. Flow cytometry is further employed to demonstrate that ZAP-70 positive cells are more responsive to signals derived from their surounding environment, such as stromal cell-derived factor 1-alpha (SDF-1a).