A curious case of antiglomerular basement membrane antibody disease.

Antiglomerular basement membrane (GBM) antibody disease is a vasculitis affecting glomerular capillaries, pulmonary capillaries, or both, with GBM deposition of autoantibodies. It can be both life- and organ-threatening and delayed diagnosis may be detrimental. Alveolar hemorrhage and microscopic hematuria should be excluded in anybody who is suspected of this disease.