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In caseating granulomatous inflammation, a calcium cut-off value of 207 ppm yielded 85% specificity and 63% sensitivity. For iron, a cut-off value of 51 ppm had 74% specificity and 58% sensitivity. High calcium and low iron levels in lymph tissue may be suggestive of caseating granulomatous inflammation and tuberculosis. In cases where differentiating between sarcoidosis and tuberculous lymphadenitis is difficult, performing tissue elemental analysis may provide additional supportive evidence for differential diagnosis. High calcium and lo