The vestibular disorder observed in cases of sudden deafness may be induced mostly by peripheral causes. About forty percents of 127 patients had complaints of vertigo with nystagmus. In some cases, spontaneous or provocation nystagmus was observed in spite of the absence of vertigo. As a rule, nystagmus was toward the affected side within about three days of the onset of hearing impairment. This thought to be the irritative stage. After this period, the direction of nystagmus changed to the opposite side. This paralytic nystagmus would be compensated by a central mechanism in two months at the latest.
The frequency components of the auditory brain stem response (ABR) waves in rats were analyzed with a minicomputer. For this purpose, a digital filtering method was used to analyze the characteristics of the filtered recorded ABR wave. The results are as follows; 1. The ABR waves in rats are composed of frequencies ranging between 0 and 3. 7 kHz, and their power spectrum has three peaks. The major components lie between 0.1 and 1.2 kHz. 2. As the stimulus sound intensity develops, the high frequency components of the ABR increase relative to the fundamental.
The number of children who visited the Jikei University Hospital because of injuries of the oral cavity during the five years from 1975 to 1979 was 24, which was 0.07% of the total new patients visiting the out-patients department of Otolaryngology during the same period. The most frequent injury was of the hard palate 14 cases, followed by bite wounds of the tongue 5 cases, injuries of the oral mucosa 2 cases and injuries of the floor of the mouth one case. The injuries were observed most often in children 1 to 2 years old who incurred injuries after falling with some object in the mouth. The treatments are in most cases, conservative with local cleanring and antibiotics for prevention of local infections. Injuries requiring surgical operation are rare.
Otosclerosis is a disease commonly found in white people but very rarely found in Japanese. Nevertheless, we have found and operated on 32 cases of otosclerosis during a 3-year period. This incidencle of otosclerosis in our clinic is extremely frequent compared with those reported by other university clinics. In order to clarify the actual prevalence of the disease in Miyazaki, sociomedical studies were carried out and the followings were listed. 1. Clinical features such as age-, sex-distributions, laterality, tinnitus e.t.c. were the same with those in white people. 2. The hereditary characters could not be found in any cases. 3. The reasons of our high prevalence of otosclerosis were discussed, but no conclusions were gainedfrom the results to date. 4. To clarify the actual prevalence of otosclerosis in Miyazaki ; further in Japan, the enlightment of this disease and also the promotion of the surgical technique are seemed to be necessary. 5. We feel certain that the clinical studies of otosclerosis in Japan should be rather valuable to resolve the genesis of otosclerosis because of its rare incidence in Japan.
The authors report a case of fibromatosis located at the radix of the tongue in an infant. The patient was found to have dyspnea immediately after birth due to the soft tissue tumors. Many polypoid tumors occupied the middle pharyngeal space. The tumor was excised surgically under general anesthesia 2. 5 hours after birth. The pathological diagnosis of the tumor was fibromatosis. The tumor has not recurred up to now after 1. 5 years. The authors reviewed the literature and discussed the nomenclature and prognosis of the infant.
In cases where both right and left internal jugular veins are to be ligated in bilateral radical neck dissection or in a patient who had previously undergone radical neck dissection on the other side, the authors performed anastomosis of the internal and external jugular veins in order to help drain the blood in the cranium. In this procedure the authors preserved the external jugular vein till the rest of the procedure for radical neck dissection were completed. The authors then cut the internal jugular vein and performed an anastomosis with the external jugular vein. The authors performed the anastomosis in 2 cases of cancer of the hypopharynx. Postoperative venography revealed that the blood flow at the site of the anastomosis in the two cases was good.