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The primary goal of this study was to verify the incidence and degree of hearing deterioration of JBSNDUE with a prospective long-term clinical follow-up.Of 173 JBSNDUE cases, 54 were followed up untill their ages reached 25-39 (average 30.7) years. In 23 cases (42.6%) hearing deterioration was confirmed. In 16 cases, discrimination scores for nonsense syllables were as low as 0%.The criteria of the “deterioration” of pure tones were irreversible average hearing level greater than 15dB at three adjoining frequencies between 0.25 and 4kHz.Except 25 of 173 cases, either binaural or monaural amplification was used. However, the incidence of hearing deterioration showed no significant difference between aided and unaided ears.The clinical features of JBSNDUE were summerized.The communication ability of those with deteriorated hearing was discussed.

The ability to locate broad band noise (0.1-10 kHz) in the horizontal plane was measured in an anechoic room with binaural In-the-Ear Aids in normal adults. There was a definite advantage in angular localization with In-the-Ear Aids over body worn and/or Behind-the-Ear Aids. This advantage is probably lost in patients with severe high tone loss.

The frequency characteristics of the external ear canal in patients wearing hearing aids were measured by a probe tube microphone under several pathological conditions: stenosis of the external ear canal, central ear drum perforation, destruction of the external attic wall, open mastoid cavity after tympanoplasty. The sound pressure level was higher in small external ear cavities than in normal ears. In central perforation of the drum, a somewhat lower sound pressure level was found in some cases. In ears with destruction of the external attic wall or with an open mastoid cavity, relatively deep dips were found in the frequency range between 1KHz and 5KHz, and the peak frequency was different in each case. The necessity to take these facts into account in fitting hearing aids is emphasized.

It is well known that reverberation interferes with speech discrimination, but it is not so well recognized that hearing aid users are more affected than normal people in reverberant environments, and that monaural hearing aids and sensorineural deafness further increase the difficulties. Five hard of hearing students in middle school were tested under the following conditions. Two of them were binaural hearing aid users and all had sensorineural deafness except one with mixed deafness. Twenty recorded short sentences were presented through a loudspeaker and the subjects were required to write down words or phrases even if they could not completely follow the meaning of each sentence, first with their own aids and then with the “telescope microphone”. The tests were performed once in the gymnasium with much reverberation and once in an ordinary class room. The test results were analysed in two ways: word and phrase discrimination and sentence discrimination. Analysis of the test results showed the advantages of the “telescope microphone” in reverberant environments.

The audiometric records of 158 children covering a 5 to 22 year span (average 12 years 4 months) were analyzed statistically and the degree of average initial loss and average relative shift were correlated. The average age at the last hearing test was 19 years 7 month.It was confirmed that ears with an initial hearing level of less than 90dB (average of 3 adjacent frequencies) showed a higher rate of deterioration (average of 3 adjacent frequencies greater than 15dB) and a greater average shift than ears with an initial hearing level over 90dB. The levels of significance were 0.1% and 1%, respectively.These results must be kept in mind in the auditory training of deaf children with hearing aids.

The purpose of auditory screening test for school children is to aid in the implementation of appropriate medical and educational measures. It is disappointing that in spite of the advice of school authorities the number of children referred to otologists is very low.With our two level screening test it is possible to determine not only the grade of the hearing loss in each child but also it's nature in about 75%. Thus, it is possible theoretically to provide appropriate educational care for school children who can not consult otologists. This is especially valuable for children in rural schools where it is difficult to find an otologist.This screening method is considered to be useful in revealing sensorineural deafness of unknown origin in children.

Forty patients of Tx No squamous cell carcinoma of mobile tongue were treated at Kobe University, Departments of Otolaryngology and Radiology between November 1975 and October 1980. Twenty-three patients had preventive neck irradiation prior to the local treatment. Six of these patients subsequently developed a neck nodal metastasis. The primary lesion was uncontrolled in 4 of these 23 cases.Eight of the 17 without neck irradiation subsequently developed a neck nodal metastasis within 1 year and the primary lesion was uncontrolled in 7 of these 17 cases. The rate of lymph node metastasis in T1 and T2 patients with neck irradiation was significantly lower than that in those without neck irradiation. Post-irradiation necrosis of the mandible occurred in 3 of the 23 patients with preventive irradiation. We consider that the preventive neck irradiation for the patients with T1 and T2, No tongue cancer is effective in destroying subclinical metastasis and the mandible should not be included in the irradiation field.

One hundred and fifty one cases of juvenile bilateral sensorineural deafness of unknown etiology were followed up for a period from 5 to 22 years (average 12 years and 2 months) in our department. Hearing (average of 1-4KHz or 1-2KHz) was unchanged ( 15dB) in 22 cases (14.6%) and deteriorated permanently in 29 cases (monaurally in 13 cases and bilaterally in 16 cases). The degree of hearing deterioration ranged from 15 to 43dB (average 27dB).The incidence of hearing deterioration showed no significant difference (α=5%) between aided and unaided ears. The incidence to fluctuation of hearing were significantly higher in deteriorated ears.The deterioration of hearing occurred in every age groups observed: 6 ears (under10 years), 16 ears (11-15 years), 11 ears (16-19 years) and 12 ears (20-30 years). The discrimination score was high (over 80%) in 37% of the patients but low (0-35%) in 30%.

A statistical study was made on 741 hard-of-hearing adults who visited the rehabilitation center from 1981 to 1987.The details of the study included age distribution, nature of hearing disorder, period of hearing aiduse, type of hearing aid used and, in future, the correlation between hearing level and discrimination score.Some problems about the delivery of hearing aids in accordance with the Welfare Law and the necessity for otologists to have more interest in this field are discussed.

The origins of tinnitus are not confined to diseases of the auditory system, but this symptom is also seen in patients with other somatic and/or psychological disturbances. It is sometimes a danger signal of hidden serious diseases.It is, therefore, important to know how often and in what disease this symptom is found. Questionnaires were filled by doctors during history taking in the outpatient clinic. The number of patients with tinnitus were;1. Orthopedic clinicdiseases of cervical vertebrae 11.3% (18/160)thoracic and lumbar vertebrae 0.6% (2/340)2. Neurosurgery clinicinfratentorial tumors 44.4% (16/36)supratentorial tumors 3.3% (2/61)3. Gynecology clinicclimacteric 37.5% (30/80)4. Internal medicine clinici) diabetes mellitus 16.0% (23/144)ii) chronic nephritis (under dialysis) 40.5% (47/116)5. Ophthalmology clinichypertensive and diabetic retinopathy 38.5% (37/96)

1. 口蓋扁桃悪性リンパ腫の放射線単独治療群の1年から4年までの生存率は, 64%, 47%, 36%, 34%であったが, 放射線化学療法併用群では82%, 66%, 60%, 49%と生存曲線は有意に上昇が認められた.2. 実測生存率による0～1年, 2～3年で放化群の生存率が有意に高かった.3. Stage I では放単群と放化群の生存率に有意差を認めなかった.4. Stage II では0～1年, 2～3年の観察期間で放化群の生存率は放単群に比較して, 有意に高かった.5. Stae III, IVでも放化群の生存期間の延長が認められた.6. Lucus-Collins の分類では Non-T Non-B の生存率が最も良く B-cell lymphoma, T-cell lymphoma でも他領域の悪性リンパ腫に比較して予後は良好であった.