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Obstructive nephropathy with infection. A diagnostic pitfall.

Four patients with indistinct abdominal symptoms associated with fever are presented. In all cases the diagnosis proved to be obstructive nephropathy with infection. The proper treatment of the patients was delayed, essentially because of a non-investigative diagnostic attitude. The necessity of making a correct diagnosis in the early course of an acute abdominal disease with fever is emphasised and some investigations that may be of great value for reaching a precise diagnosis are indicated.