Following peripheral blood testing and a bone marrow biopsy, a client has been diagnosed with chronic myelogenous leukemia. Which of the following is most likely to have preceded the client's diagnosis?

A) The presence of a Philadelphia chromosome
B) Down syndrome
C) Radiation exposure
D) Exposure to the Epstein-Barr virus


Ans: A
Feedback:
Chronic myelogenous leukemia develops when a single, pluripotent hematopoietic stem cell acquires a Philadelphia chromosome. Down syndrome and radiation exposure are associated with acute leukemias, and exposure to the Epstein-Barr virus is not implicated in the etiology of leukemias.

Health & Biomechanics

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