A Myeloperoxidase Stain Is Performed on Peripheral Blood Cells of a Patient

question 5

Multiple Choice

A myeloperoxidase stain is performed on peripheral blood cells of a patient with acute leukemia and 85% blasts; the patient has an occasional mature neutrophil. When the stained slide is evaluated, the blasts are all negative but the mature neutrophils are strongly positive. What is the significance of this finding?

• A) The stain worked (internal positive control).
• B) Nothing can be determined until a positive control is also examined.
• C) Nothing can be determined because mature neutrophils are always positive.
• D) Nothing can be determined because only examination of the blasts is useful.

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Definitions:

Dendrites

The branch-like structures of neurons that receive messages from other neurons and conduct impulses towards the cell body.

Terminal Buttons

Small structures at the end of a neuron's axon that release neurotransmitters to communicate with other neurons.

Neuron's Cell

The basic working unit of the brain, a specialized cell designed to transmit information to other nerve cells, muscle, or gland cells.

Computational Device

An electronic machine or system, such as a computer, that performs automated calculations or processing of information.