Unilateral Alveolar Hemorrhage: A Rare Pulmonary Complication in Systemic Lupus Erythematosus.

Systemic lupus erythematosus (SLE) is an autoimmune disease that presents a broad spectrum of clinical manifestations. Alveolar hemorrhage in SLE is rare and has a poor prognosis. We present the case of a patient with a diagnosis of SLE and lupus nephropathy on hemodialysis who presented criteria for alveolar hemorrhage with unilateral involvement, with clinical improvement after the administration of steroid boluses. The uncommon presentation of unilateral pulmonary involvement and the importance of making an adequate protocol for ruling out differential diagnoses are highlighted.