ABSTRACT
The authors present the results of liver scanning in 447 patients with pulmonary hydatic cysts. Abnormal scan was noted in 126 cases [28,2%]. The percentage of abnormal scan is only 4,4% in patients without clinical or radiological indication of hepatic disease. This percentage is 23% in presence of pain in the right hypochondrium, 32% in presence of raising of the right diaphragm in chest Ray, 51,6% in presence of hepatomegaly and 75%, in cases with association of two or three of previous elements. Liver scan is more often abnormal in right unic pulmonary hydatic cyst [32,1%] than in left one [23,7]. In multiple pulmonary hydatic cyst the percentage is 28,7%. At last results vary also according to immunologic reactions. Liver scan is more often abnormal in cases with positive Casoni [28,2%] than,in cases with negative Casoni [5%]. It is more often abnormal in cases with positive serologic reactions [34%] than in cases with negative ones [20%]