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Pegfilgrastim is a granulocyte colony-stimulating factor used in non-myeloid cancer patients to prevent infections and neutropenic fevers. Although this medication is widely used to induce granulocytosis in pancytopenia patients, there are certain instances where such a situation can cause severe side effects. In this case, we present a patient with a history of metastatic colon cancer who is currently taking pegfilgrastim to counter the agranulocytosis caused by his chemotherapy treatment. However, the patient shortly developed localized left-sided jaw swelling, and upon further investigation, the granulocyte colony-stimulating factor revealed an underlying bacteremia. A discussion will also be held regarding the mechanism of action of how pegfilgrastim induced this patient's symptoms as well as the risks and benefits.
Dao et al. (Wed,) studied this question.