“…It is generally known that patients with primary hyperparathyroidism have disturbances in carbohydrate metabolism: in particular, hyperinsulinaemia and insulin resistance are characteristic early metabolic aberrations of this disease (Kim et al, 1971;Yasuda et al, 1975;Harter et al, 1976;Prager et al, 1983Prager et al, , 1990). In addition, primary hyperparathyroidism significantly increases the risk of developing overt glucose intolerance or even frank diabetes mellitus (Dent, 1962;Ljunghall et al, 1983;Werner et al, 1974;Cheung et al, 1986;Birge, 1969;Walsh et al, 1975).…”