摘要:

Odontoma of the middle ear cleft is an unusual cause of conductive hearing loss. We report two cases and discuss the developmental mechanism by which this anomaly may occur. The differential diagnosis of calcified masses in the middle ear is also discussed.

ISSN:0192-9763    

出版商:OVID    

年代:1991

数据来源: OVID

摘要:

Idiopathic or spontaneous hemotympanum (SH) is an uncommon disorder characterized by a black-blue tympanic membrane discoloration as a result of recurrent hemorrhage in the middle ear or mastoid in the presence of eustachian tube obstruction. Initial evaluation of a blue middle ear mass includes an audiogram and computed tomography (CT) scan with intravenous contrast. CT may identify congenital vascular malformation or bone erosion due to chronic otitis media or tumors. A magnetic resonance imaging (MRI) scan is useful in distinguishing hemotympanum from a vascular tumor and avoiding angiography, which is associated with significant morbidity. Evidence suggests that secretory otitis media and SH are different phases of the same disease process.

ISSN:0192-9763    

出版商:OVID    

年代:1991

数据来源: OVID

摘要:

Mitochondrial disorder is an inborn error of metabolism affecting the cellularrespiratory chain. Defective energy production leads to a wide variety of clinicalmanifestations (ataxia, epilepsy, dementia, myopathy, polyneuropathy, retinal pigmentanomalies, and cardiomyopathy with conduction anomalies). Hearing loss is a regularfeature and is often the first clinical symptom. Audiologic data from 26 members of afamily in three generations is presented. One of these patients was examined for thebiochemical error. Respiratory study of muscle biopsy revealed a mild defect in theNADH-ubiquinone oxidoreductase step of the oxidative phosphorylation (complex I).The content of cytochrome aa3(complex IV) was also reduced. Adult onset sensorineuralhearing loss starting in the high frequency region progresses with a fairly constant speedin this family. A cochlear type of hearing loss is found in the less pronounced cases.Advanced cases present features of retrocochlear affection with decreasing speechrecognition, elevated acoustic reflex thresholds, and increased ABR latency with de-rangement of potentials. Caloric sensitivity was unaffected.

ISSN:0192-9763    

出版商:OVID    

年代:1991

数据来源: OVID

ISSN:0192-9763    

出版商:OVID    

年代:1991

数据来源: OVID

摘要:

Accurate preoperative diagnosis of petrous apex lesions is critical because thesurgical approaches used for this region are different depending upon the specific diseaseprocess involved. While CT and MRI have each improved the accuracy of preoperativediagnosis of petrous apex pathology, these imaging studies are most helpful when usedin conjunction with one another. When systematically applied, the combination of CTwith contrast and MRI (with and without gadolinium) permits accurate differentialdiagnosis of primary petrous apex lesions. This review presents the imaging approachemployed at the House Ear Clinic for the differential diagnosis of primary lesions of thepetrous apex.

ISSN:0192-9763    

出版商:OVID    

年代:1991

数据来源: OVID

摘要:

Cerumen impaction and removal is a very common otologic problem. The perfect cerumenolytic agent has yet to be developed. After years of trying multiple different cerumenolytics without satisfaction, a stool softener, docusate sodium, has become our agent of choice. A commonly used stool softener, it is widely available without prescription. It is a highly effective cerumenolytic, but remains relatively unknown in this capacity.

ISSN:0192-9763    

出版商:OVID    

年代:1991

数据来源: OVID

摘要:

At the Eastern Section Meeting of the Triological Society January 26,1990, Levinson et al reported outstanding success with ciprofloxacin in the treatment of malignant otitis externa. Moreover, several of the individuals so managed had been refractory to conventional therapy with semisynthetic penicillin and aminoglycoside protocols. This new class of antibiotics may result in a profound change in our management of patients with otologic, neurotologic, and skull base infections.

ISSN:0192-9763    

出版商:OVID    

年代:1991

数据来源: OVID

ISSN:0192-9763    

出版商:OVID    

年代:1991

数据来源: OVID

ISSN:0192-9763    

出版商:OVID    

年代:1991

数据来源: OVID

ISSN:0192-9763    

出版商:OVID    

年代:1991

数据来源: OVID