Scintigraphic examination of the lungs in sarcoidosis has been used as a supplement method of the functional examination. Perfusion scintigraphy enables to locate places with lowered regional perfusion in the form of spotted fall outs. In some cases of hilar lymphonodular forms of sarcoidosis we can already find some diffuse spotted fall outs of perfusion even if parenchymatous changes are still not visible. Up to now we have not seen any lobar or alar fall outs of radioactivity, as they can be found in central types of bronchogenic carcinoma. In sarcoidosis with micro- or macronodular X-ray shadows the scintigraphic defect in its extent sometimes does not correspond to these changes. On the basis of our material the mutual relation between scintigraphic pictures on one hand and blood gases on the other hand could not been neither confirmed nor eliminated.