Eosinophilic Granulomatosis with Polyangiitis Presenting as Steroid-Responsive Sclerosing Cholangitis and Cholecystitis: A Rare Case Report

Objective: Unusual clinical courseBackground: Eosinophilic granulomatosis with polyangiitis (EGPA) is a rare systemic vasculitic condition characterized by bronchial asthma and eosinophilia. While biliary involvement is uncommon in EGPA, we present a unique case of EGPA presenting as steroid-responsive sclerosing cholangitis and cholecystitis. This case highlights the im-portance of considering EGPA in the differential diagnosis of biliary diseases, especially in patients with a his-tory of bronchial asthma.Case Report: A 47-year-old man with a history of bronchial asthma presented with fatigue, weight loss, and epigastralgia. Blood tests revealed eosinophilia and elevated inflammatory markers, leading to the diagnosis of EGPA. Further imaging studies, including magnetic resonance cholangiopancreatography and contrast-enhanced computed tomography, confirmed the presence of sclerosing cholangitis and cholecystitis, a rare manifestation of EGPA.Conclusions: Prompt treatment with prednisolone and azathioprine resulted in remission of symptoms and resolution of cholangitis and cholecystitis in this case. Our findings emphasize the importance of early recognition and ap-propriate management of EGPA-associated biliary involvement. Increased awareness of this rare manifestation may facilitate timely diagnosis and improve patient outcomes.