Two cases of lung granulomata associated with "crescentic" glomerulonephritis both in a clinical setting of polyarteritis nodosa were treated with high doses of intravenous methylprednisolone ("pulse therapy") in single injections of 30 mg/kg body-weight. In the first case rapidly progressive glomerulonephritis with 100% crescents was arrested and followed by improvement of renal function from a creatinine clearance of 5 ml/min to 30 ml/min; in the second case multiple lung granulomata of 8 months' standing, unresponsive to oral steroids, disappeared 8 days after treatment with high dosage intravenous methylprednisolone. The use of "pulse therapy" with methylprednisolone is advocated, not only in such cases where arteritis is known or suspected, but also in radidly progressive glomerulonephritis associated with crescents.
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