A 59-year-old male was initially diagnosed with pemphigus Vulgaris and received rituximab after a suboptimal clinical response with low-dose steroids and cyclophosphamide. Shortly after the third dose, he had acute interstitial pneumonia which was attributed to rituximab as there were no signs of any infective etiology after a detailed workup. He was put on mechanical ventilation but the dramatic response to pulse steroids helped the patient in early extubation and a favorable outcome.
Keywords: ct scan; ild; pemphigus; rituximab; steroids.
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