[The relation between serum levels of calcium and PTH and the positivity of parathyroid scintigraphy with sestamibi--analysis of 194 patients].

To correlate PTH and calcium serum levels with the percentages of positive results on the parathyroid scintigraphy, we retrospectively analyzed 194 patients who performed parathyroid scintigraphy. The distribution of the parathyroid scintigraphy results was visually analyzed in a scatter plot, being calcium (Y axis) and PTH (X axis) serum levels the axes. Six groups of patients were defined: 1) calcium > or = 12 mg/dL; 2) 11 mg/dL calcium < 12 mg/dL; 3) 9.