Acute Lymphoblastic Leukemia (ALL) (Acute Lymphocytic Leukemia) By Ashkan Emadi, MD, PhD, University of Maryland; Jennie York Law, MD, University of Maryland, School of Medicine Reviewed / Revised Jun 2022 | Modified Sep 2022 View Patient Education Pathophysiology Classification Symptoms and Signs Diagnosis Prognosis Treatment Key Points More Information Topic Resources Peripheral Blood Blast Cell Common Cytogenetic Abnormalities... Acute lymphoblastic leukemia (ALL) is the most common pediatric cancer; it also strikes adults of all ages.