The significance of local malignant lesions of the neck diagnosed accidentally during parathyroid exploration.

Three cases are presented in which strictly localized, malignant lesions in reticuloendothelial or mesenchymal tissue of the neck with varying degrees of differentiation were diagnosed accidentally during parathyroid exploration. No signs of metastatic dissemination or primary tumour with other localization were found. In all three cases, the identified changes were removed and a careful follow-up has not hitherto indicated that further treatment in these cases were necessary.