A patient with systemic lupus erythematosus (SLE) develops rapid-onset respiratory failure. Histology shows intra-alveolar hemorrhage and capillaritis. This pattern is best described as:
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Correct answer: Diffuse Alveolar Hemorrhage syndrome
Diffuse Alveolar Hemorrhage is a clinical-pathological syndrome characterized by blood in the alveolar spaces. It is often caused by small-vessel vasculitis (capillaritis) in autoimmune diseases like SLE or Goodpasture syndrome.
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