A routine CBC is ordered on a patient. Results are as follows: WBC count: 22.0 × 10⁹/L
PLT: 957 × 10⁹/L
RBC: 5.00 × 10¹²/L
PB smear: moderate platelet clumping and giant platelets noted
These results are characteristic of which disorder?

Question

Quizplus · Accepted Answer

The elevated platelet count and presence of giant platelets are characteristic of essential thrombocythemia (ET). The WBC count and PB smear findings do not support a diagnosis of polycythemia vera (PV), chronic myelogenous leukemia (CML), or primary myelofibrosis (PMF).

A Routine CBC Is Ordered on a Patient