[The definition of clinical catabolism by the urea production rate and its correlation with cellular immunity].

In 38 preoperative patients the production of urea was estimated and the cell-mediated immunity was measured. 10 patients were catabolic and had negative skin tests, all of them were inoperable. 15 patients were catabolic and had positive skin tests five patients were inoperable. 12 patients were not catabolic and had positive skin tests, two were inoperable. One female patient was not catabolic and had negative skin tests, but was operable. The catabolic state can be assessed by the urea production rate and you can give prognostic and therapeutical references in correlation with the delayed hypersensitivity.