Granulocyte colony stimulating factor-associated aortitis evaluated via multiple imaging modalities including...

Granulocyte colony stimulating factor (G-CSF) preparations are used for patients with granulocytopenia, especially to prevent febrile neutropenia. Arteritis has been recognized as a side effect of G-CSF treatment; however, there are no clear diagnostic criteria or treatment guidelines because not enough cases have been reported. Present case showed one of the diagnostic and treatment selection methods via multiple imaging modality including vascular echography.

A 52-year-old woman underwent chemotherapy for ovarian cancer and received G-CSF because of myelosuppression. The patient experienced high and remittent fever that persisted during treatment using antibiotics and acetaminophen. Enhanced computed tomography revealed thickening of the tissue around the aortic arch and abdominal aorta. Echography of the abdominal aorta revealed thickening of the wall and a hypoechoic region around the aorta. Gadolinium-enhanced magnetic resonance imaging and ¹⁸F-fludeoxyglucose positron emission tomography also revealed that the inflammation was localized to the lesion. A suspicion of G-CSF-associated aortitis was based on the patient's history and the exclusion of other diseases that might have caused the aortitis. Her condition rapidly improved after starting corticosteroid treatment.

The differential diagnosis in similar cases should consider immune diseases that cause large-vessel arteritis (Takayasu arteritis, giant cell arteritis, and another vasculitis), infection, drug-induced disease, and immunoglobulin G4-related disease. The use of different imaging modalities, including vascular echography, helped guide the diagnosis and follow-up. It is necessary to evaluate the patient's general condition before the selection of treatments.