Measuring WBCs

• The Basics
• Reactive
• Terms

• Acute Leukemia
• Dysplasia
• Myeloproliferative

• Acute
• Chronic 

Quiz Please

The defining feature of acute lymphoblastic leukemia/lymphoma (ALL) is the presence of the lymphoblast.

Highly immature lymphocytic precursor of either T or B lineage.  Roll the cursor over the image to see an important cytologic feature.

Acute lymphoblastic leukemia:

• Leukemia represents the majority of lymphoblastic malignancies (85%)
• These are Pre-B cell tumors.
• This is the classic ALL of childhood.

• Less common (15%)
• Pre-T cell tumors.
• Adolescent males.
• Mediastinal and/or thymic involvement.