抄録
Statistical observation was made on 47 cases with hilar cavities of pulmonary tuberculosis hospitalized in the Tochigi National Sanatorium.
Results:
1) Hematoptysis was seen in 29 cases (60%) and positive tubercle bacilli in sputum in 39 cases (60%). Chemotherapy was administered in each case.
2) Twenty-seven cases (62%) had cavities in the left lung and in 33 caaes (80%) cavities were seen in Seg. 6. Thirty cases (64%) had round forms, 70% were thin walled and 97% were soft walled.
3) In order to observe the relationship between chemotherapy and roentgenographical transformation of hilar cavities 40 cases were examined. Seven cases (18%) indicated cavity closure and 10 cases (50%) showed dwindling in the diameter of the cavity.
4) Conversion of negative tubercle bacilli in sputum was noticed on 6 cases within 2 years and the diameter measured on an average of less than 40mm.
