A 42-year-old man with a history of ulcerative colitis (UC), primary sclerosing cholangitis (PSC) and chronic sinusitis was referred to a rheumatologist to evaluate for a possible diagnosis of systemic vasculitis. This patient had developed new skin lesions, gingival hypertrophy and ulcerating tracheobronchitis, concerning for possible granulomatosis with polyangiitis (GPA). Since 1994, the patient had…
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