[Recurrent metabolic alkalosis due to pyloric stenosis]

After an inability to work lasting 15 months with 9 treatments in an inpatient department in several institutions in a 33-year-old patient the relapsing metabolic alkalosis in hypopotassiaemia and relapsing increase of the creatinine level could causally be clarified by establishment of a pylorus stenosis in chronic duodenal ulcer. Due to the Billroth II operation a complete clinical and objective improvement developed. In this case the transient retention of substances normally contained in the urine was conditioned by a hypokalaemic nephropathy. The cause of the hypokalaemia was the vomiting by pylorus stenosis. The histologically ascertained glomerulonephritis had no causal significance for the pathological process.