The present authors have observed the clinical course of five patients with laryngealcarcinoma receiving Co60 irradiation. One case after having received 7 250 γ of Co60 irradiationhas taken a smooth course without any symptoms of recurrence, two cases suffered fromrecurrence after having received 5 694 γ and 7 000 γ of Co60 irradiation, respectively. Anadditonal irradiation of 4 070 γ and 4 506 γ was given to the latter two cases and perichondritisappeared soon after. Operation could not be made in one of the two cases, while there wasa recurrence in the other case after operation. Both cases proved fatal later. In the remainingtwo cases 4 500 γ and 8 500 γ of Co60 irradiation were given, respectively. There wasa recurrence in the former case, while in the latter case irradiation was discontinued due tothe poor general conditions and total extirpation was carried out instead resulting in cure. From the above results it was concluded that the selection of the cases is necessary inorder1960. 3. 3to anticipate effective results with Co60 irradiation. It was also stressed that perichondritis and necrosis of cartilage are liable to occur if Co60 irradiation is continued for a long period on far progressed cases or those with recurrence, and there is also a danger o missing the right time for operation.
The authors have described two cases of a large tumor of the pituitary gland demonstratingremarkable eye symptoms and in which total pernasal extirpation was successively carried out. Histopathologically, the two cases were neurilemoma and chromophobe adenoma, and their extirpated weights were 6.5 g and 11 g, respectively. Roentgenologically, the disappearance and appearance of the curvature of the sella turcica were comparatively studied. Both cases revealed partial recovery of the visual field after operation, however, complete recovery cannot be anticipated if a long time has elapsed after onset of symptoms. The beneficial points of the improved pernasal operation as compared to the hitherto craniotomy have been ciscussed, and the authors have stressed that tumors of the pituitary gland should be operated pernasally by specialists in the field of otorhinology.
Histopathological studies on the developmental mechanism of acute peritonsillitis and peritonsillar abscess were carried out and the following results were obtained. This condition is caused by the inflammation of the lacuna and deeper portion of the tonsils, and has an intimate relation with chronic inflammation and anatomical morphology. The mucus glands do not play an important role in the etiology of this disease, but the role played by the mucus gland and inflammation are considered to be secondary. Peritonsillar abscess is formed in the order of parenchymal inflammation, small abscess formation in parenchyma and then pertonsillar abscess.
The group voice test with the tape recorder has been applied for the physical examination of entrance exams during the past 4 years·Twenty five groups of meaningless syllables (standard pronunciation) were recorded and applied. The students listened to the recording and a chart was prepared under the point system to obtain the rate of accurate hearing. A line was drawn at a certain percentage, and those with points below this level were reexamined two days later with an audiometer and other detailed tests. The average hearing difference between the two groups was about 5 db, and diseases of the ear was conformed in about 20-50 % of the rexamined group. The difference in hearing rate by the location of the seat was examined, and it was found that they were not influenced by the distance of the speaker. Improvement of acoustic hygiene in school education and the deaf was stressed.