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The discovery of a fructose-1,6-diphosphatase deficiency in two sisters leads to the discussion of the various loading tests which are required for the diagnosis. The diagnosis may be discussed clinically with type I glycogenosis, and biologically with hereditary fructose intolerance. The specific characteristics of these disorders are analyzed as well as the problem of fructose induced hypoglucosemia. The failure of the treatment with folic acid in one of the cases leads to emphasize the suppression of prolonged fast in order to avoid acute accidents.

The authors report a case of painful joint, para-articular and muscular involvement accompanying acne conglobata. Fifteen other cases of rheumatism associated with this very special type of acne have been reported. The patients affected are young men suffering from acne conglobata (severe form of acne characterised by its ulcerating course and the possibility of its being accompanied by systemic manifestations), who suddenly develop fever, an altered general state and assymetrical arthralgia involving mainly the large joints, accompanied by signs of muscular involvement. The course is one of spontaneous recovery, relapses being possible. This falls within the context of the group of rheumatic disorders associated with the signs of an inflammatory skin disease.