RT Journal Article SR Electronic T1 Primary vasculitis at high altitude. JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 1450 OP 1451 VO 31 IS 7 A1 Gayatri Mittal A1 Nahreen Hasso A1 Peter Maddison YR 2004 UL http://www.jrheum.org/content/31/7/1450.abstract AB We describe a 34-year-old mountaineer who presented with gut infarction from necrotizing vasculitis, probably due to Churg-Strauss syndrome. Subsequently, relapses occurred whenever he climbed to 4000 meters. We hypothesize that the effects of vasculitis were compounded by the physiological changes at high altitude. We suggest that patients with systemic vasculitis should be cautious about climbing and trekking at high altitude.