Granulomatosis with Polyangiitis (Wegener Granulomatosis) Presenting as a Pancreatic Mass: A Rare Malignancy Mimic

Key Points

• To describe a rare case of granulomatosis with polyangiitis presenting as a pancreatic mass.
• Detailed case report of a patient with pancreatic mass
• Clinical evaluation and diagnostic imaging used
• Histopathological analysis for confirmation
• Granulomatosis with polyangiitis was confirmed as the diagnosis
• The pancreatic mass initially misdiagnosed as malignancy
• Patient improvement observed following targeted treatment