摘要:

The diagnosis of perilymphatic fistula can be confusing and prone to error. The signs and symptoms can be extremely varied, and currently there is no clinical or laboratory test that accurately predicts the presence of this entity. The only reliable method of diagnosis, namely surgical exploration, is often frustrating as, commonly, no evidence of an active fistula is found. Four children initially believed to have a perilymphatic fistula were found on exploration instead to have an absent round window reflex with normal mobility of the ossicular chain. These children presented with a history of abrupt, step-wise decreases in their hearing thresholds that frequently progressed from a mixed to a purely sensorineural loss. No anatomic abnormalities were found on high-resolution computed tomography. The authors theorize that this finding may represent altered fluid dynamics within the inner ear. Whether it signifies a prior fistula that has spontaneously healed remains to be confirmed. A review of the literature along with possible pathophysiologic mechanisms is presented.

ISSN:0192-9763    

出版商:OVID    

年代:1994

数据来源: OVID

ISSN:0192-9763    

出版商:OVID    

年代:1994

数据来源: OVID

摘要:

Sudden hearing loss in the contralateral ear is a rare but catastrophic complication of acoustic tumor surgery. The seventh case in the literature is reported. Hearing can return, but this is less likely when the tumor was large or a suboccipital approach was used. A short course of corticosteroids, carbogen, and histamine cannot be shown to be effective but is probably worthy of consideration. Cochlear implantation may have a role if irreversible hearing loss persists 18 months after surgery.

ISSN:0192-9763    

出版商:OVID    

年代:1994

数据来源: OVID

摘要:

Two sisters, who are identical twins, had a simultaneous idiopathic sudden hearing loss (ISHL) while listening to loud music at a rock concert. The possibility that their hearing losses, along with the sudden hearing losses related to cordless telephone injuries, are attributable to intracochlear membrane ruptures is discussed.

ISSN:0192-9763    

出版商:OVID    

年代:1994

数据来源: OVID

摘要:

Sudden sensorineural hearing loss (SSHL) has been associated with many etiologies. However, determining the exact cause of SSHL remains elusive. Recent reports have demonstrated the usefulness of magnetic resonance imaging in identifying the site of lesion in SSHL. This report presents the case of a 68-year-old male who presented with right-sided SSHL associated with right-sided facial paralysis. Magnetic resonance imaging demonstrated a focal area of increased signal on T2-weighted image within the right inferior pons, suggestive of a postischemic edematous focus. Magnetic resonance imaging is becoming important in establishing the etiology of SSHL. Magnetic resonance imaging findings in cases of hearing loss are discussed.

ISSN:0192-9763    

出版商:OVID    

年代:1994

数据来源: OVID

摘要:

A case of an accidentally discovered, nonsymptomatic cavernous angioma of the middle ear in a 29-year-old white male Caucasian is presented together with a review of the relevant literature. The lesion is documented with computer tomography, light microscopy, and immunohistochemistry.

ISSN:0192-9763    

出版商:OVID    

年代:1994

数据来源: OVID

摘要:

Chondrosarcoma, although uncommon, must be included in the differential diagnosis of skull base tumors. The potential for morbidity and mortality, similar to other lesions located at this anatomic site, is related to compromise of adjacent vital neurovascular structures. Optimal surgical management is controversial and reliant on adequate tumor exposure. A case of myxoid chondrosarcoma of the jugular foramen is presented with a review of the common presenting signs and symptoms along with the radio-graphic and histologic features of these lesions. The surgical approach to chondrosarcoma and other lesions at this location has undergone an evolution in technique in recent years. This report details the approach used by the authors, which allows for reconstruction of the skull base with subsequent normal anatomic contour and functional hearing. The technique employs hydroxylapatite for reconstruction, which has not been previously described in skull base applications.

ISSN:0192-9763    

出版商:OVID    

年代:1994

数据来源: OVID

摘要:

Extramedullary plasmacytomas are rare plasma cell tumors of the soft tissue that predominantly occur in the head and neck. They are most commonly seen in the upper respiratory passages and oral cavity. There have been only a few reports in the world literature of plasmacytomas occurring within the temporal bone. This report presents a case of plasmacytoma of the middle ear and mastoid that presented as a middle ear mass. Work-ups for systemic dissemination and multiple myeloma were negative, classifying this as a localized extramedullary plasmacytoma. This is the first report in the English literature of this malignant tumor occurring as an isolated lesion within the middle ear and mastoid. The patient was treated with surgical debulking and radiotherapy with complete resolution of the tumor. Although extremely rare, plasmacytoma should to be included in the differential for soft tissue tumors of the middle ear and mastoid.

ISSN:0192-9763    

出版商:OVID    

年代:1994

数据来源: OVID

摘要:

Giant cell tumor of the skull is a rare clinical entity. This report presents the case of a 32-year-old female with Turner's syndrome and a giant cell tumor of the left middle cranial fossa floor. Although there have been sporadic reports of patients with extragonadal tumors, to our knowledge this is the first reported case of giant cell tumor in a patient with Turner's syndrome. Definitive treatment is surgical extirpation; however, recommendations for cases of subtotal excision remain controversial. Management of this patient with giant cell tumor of the skull is described, and current treatment recommendations are discussed.

ISSN:0192-9763    

出版商:OVID    

年代:1994

数据来源: OVID

摘要:

An unusual case is reported in which a preauricular cyst associated with a congenital cholesteatoma caused facial nerve paralysis in a 40-year-old woman. The patient underwent three exploratory temporal bone operations to locate a source of facial nerve compression, but the cause of the palsy was not found until resection of a preauricular cyst revealed an epithelial tract that was traced through the external auditory canal and across the tegmen tympani to the site of the cholesteatoma.

ISSN:0192-9763    

出版商:OVID    

年代:1994

数据来源: OVID