Two autopsy cases of acquired immunodeficiency disease syndrome are reported. One case showed widespread miliar cryptococcosis, with scarce inflammatory response. The other developed respiratory failure due to pulmonary infection by P. carinii. In both cases we could observe generalized cytomegalic infection, with striking adrenal involvement. Special emphasis is given to the pathologic changes and the possible etiopathogenic role of cytomegaloviroses in the acquired immunodeficiency cases.