The best cutoff point for 1-84 PTH to discriminate hyperparathyroidismfrom normal condition was 60 yielding a sensitivity of 92.3% and a specificity of 79.1%.Among other baseline laboratory parameters, only alkaline phosphatase had an acceptablevalue for diagnosing hyperparathyroidism (AUC = 0.731, P = 0.001). The gene discussed is PTH; the disease is hyperparathyroidism.