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At least 685 records · Page 38Linked to original sources
PubMed2002

Emergency department management of foreign bodies of the external ear canal in children.

OBJECTIVE: To evaluate the management of foreign bodies in the external auditory canal (EAC) in pediatric patients by emergency department personnel. SETTING: Tertiary care pediatric hospital emergency department. STUDY DESIGN: A retrospective chart review of children with foreign bodies of the EAC over a 12-month period. Age, foreign body type, rate of successful removal, and complication rates were recorded. Foreign bodies were categorized into two groups: objects with smooth surfaces and not easily grasped (nongraspable) and objects with irregularly shaped surfaces and easily grasped (graspable). RESULTS: Thirty-six patients were brought to the emergency department over a 12-month period with foreign bodies of the EAC. Their mean age was 6.5 years (range, 1-16 yr). Numerous foreign bodies were noted; beads were the most common. Successful removal was achieved in 53% of cases, and one or more complications were recorded in 47%. When the foreign bodies were grouped into nongraspable and graspable objects, the success rate for the nongraspable group was 45%, with a complication rate of 70%, whereas for graspable objects the successful removal rate was 64%, with a complication rate of only 14%. The difference in complication rates was statistically significant (p < 0.001.) CONCLUSION: This study demonstrates that certain foreign bodies (graspable type) of the EAC in pediatric patients can be successfully managed by skilled emergency department personnel with low complication rates, whereas other foreign bodies (nongraspable types) may be better managed by early referral to an otolaryngologist.

Adolescent↗
PubMed1994

[Cutaneous neuroendocrine carcinoma of the external ear canal].

Authors report a case of a neuroendocrine carcinoma (Merkel cell tumor) located in the external meatus. These tumors have a fearsome prognostic. Immunohistochemical study has become indispensable to make the diagnosis. A literature review is presented, and therapeutic choices discussed. Wide and precocious surgical resection is advised.

Aged↗
PubMed1990

External ear resonance in children with otitis media with effusion.

A middle ear effusion has been shown, in KEMAR, to increase the height of the resonant peak of the external auditory canal by 6 dB SPL. It has also been shown that the hearing impairment due to otitis media with effusion is related to the volume of middle ear fluid. Therefore, it was hypothesized that measurement of the height of the resonant peak of the external auditory canal could be used as a method of assessing the magnitude of any hearing impairment due to otitis media with effusion. 182 ears from 182 children aged 3-12 (mean 6.3) years were studied. Pure-tone audiometry and impedance tympanometry were performed, and the acoustics of the external auditory canal were measured using the Rastronics CC1-10 frequency response analyser. The mean height of the resonant peak (17.9 dB SPL) of children with a type A tympanogram was significantly different from the mean value (23.6 dB SPL) of those with a type B tympanogram. There was a significant correlation between the height of the resonant peak and the speech frequency average of the pure-tone thresholds. The sensitivity and specificity of using the height of the resonant peak to detect hearing impairments in different age groups were calculated and compared with the sensitivity and specificity of tympanometry. The test did not provide the same degree of sensitivity as tympanometry but was more specific. The additional advantages of the test are that it is quick, taking less than 1 min per ear, and is well tolerated by children in whom there was a 99% compliance.(ABSTRACT TRUNCATED AT 250 WORDS)

Acoustic Impedance Tests↗
PubMed1991

Polyp of the external ear canal arising from the temporomandibular joint: a case report.

A polypoid mass of granulation tissue in the external auditory meatus was found to be arising from the ipsilateral temporomandibular joint (TMJ). The origin of the lesion was suspected clinically and was confirmed by a CT scan study. As the patient showed signs of psoriatic arthritis, it seems likely that this was the underlying pathological process in the joint. A patent foramen of Huschke allowed herniation of synovial tissue from the joint into the external auditory canal.

Diagnosis, Differential↗
PubMed1981

Angiolymphoid hyperplasia with eosinophilia of the external ear canal.

Angioblastic lymphoid hyperplasia with eosinophilia, or Kimura's disease, is a clinically and histopathologically recognized entity that is characterized by cutaneous nodules, proliferating blood vessels with atypical histiocyte-like endothelial cells, and numerous eosinophils. It has been treated with steroids and by surgical excision, irradiation, cryotherapy, and electrodesiccation. Persistent residual disease and local recurrence are frequent. We review the literature and report two cases that involve the ear. We present the histopathologic and clinical results of laser removal of a conchal and external canal lesion.

Adult↗
PubMed1984

[Stenosis of the external ear canal due to meniscus intrusion].

The authors, maxillo-facial and ENT surgeons, present a unique case of hearing impairment due to external meatus obstruction, occurring at mandibular occlusion. On the contrary, a dimple of the anterior wall was noted at opening of the mouth, with recovery of the hearing impairment. The external meatus returned to normal after resection of posterior mandibular disc protrusion, combined with interposition of a cartilaginous homograft. Etiology of this condition is unknown and a search through the literature revealed no similar observation.

Cartilage, Articular↗
PubMed1983

[Locally aggressive fibrous histiocytoma of the external ear canal].

This article reports on clinical as well as light-microscopical and electron-microscopical findings in a fibrous histiocytoma of the left external auditory canal. The patient, who was then 67 years old, complained of a space-occupying mass in the external auditory canal which resulted in partial deafness. On microscopical examination a 3 x 2 cm large tumour was found to be located at the boundary between the osseous and the cartilaginous auditory canal. The covering skin was intact. On histological examination we identified a moderately cellular, locally aggressive fibrous histiocytoma. To our knowledge, no fibrous histiocytoma of this localisation has ever been reported. The diagnosis can be made on histological grounds only. Differential diagnosis includes, besides a ceruminoma, almost all benign and malignant non-epithelial tumours of the external auditory epithelial canal. Surgical removal is the therapy of choice. One year after the operation there has been no relapse.

Aged↗
PubMed1991

[Leiomyosarcoma of the external ear canal].

We report on a 45-year-old male patient with the signs of exophytic, obstructive and painless tumour of the right external auditory canal developed within a period of about 3 months. The tumour was completely removed in local anaesthesia and histologically found to be a leiomyosarcoma. The only possible origin of this lesion might be the smooth muscle cells of the local blood vessels or the mm. arrectores pilorum.

Ear Canal↗
PubMed1987

Cavernous hemangioma of the external ear canal.

Cavernous hemangiomas are benign tumors of blood vessel origin. Cavernous hemangiomas arising from the tympanic membrane with or without involvement of the skin of the deep external auditory canal may occur in rare cases. In this paper, the clinical and pathological findings in the first recorded case of a patient with a cavernous hemangioma arising from the skin of the deep external canal with no involvement of the tympanic membrane are presented.

Ear Canal↗
PubMed1990

Steroid sulfatase activity in the skin of the external ear canal.

Steroid sulfatase is an enzyme which has an important role in the complex process of cell desquamation. The specific activity of this enzyme was found to be higher in the epithelium of the deep external auditory canal than in the epithelium of the superficial external canal. We speculate that this steroid sulfatase activity gradient is involved in the outward migration of the keratinocytes of the canal epithelium.

Analysis of Variance↗
PubMed1987

Eccrine hidrocystoma of the external ear canal: a case report.

Eccrine hidrocystomas are essentially sweat gland retention cysts located in the dermis. Clinically, an eccrine hidrocystoma presents as a small, translucent cystic swelling (often having a bluish hue), and measuring from 1 to 3 mm in diameter. The clinical and histopathological features of an eccrine hidrocystoma of the external auditory canal are presented, and the morphologic differences between an eccrine and an apocrine hidrocystoma are discussed.

Ear Canal↗
PubMed2002

Surfer's ear: external auditory exostoses are more prevalent in cold water surfers.

OBJECTIVE: The study goal was to demonstrate the prevalence and severity of external auditory exostoses (EAEs) in a population of surfers and to examine the relationship between these lesions and the length of time surfed as well as water temperature in which the swimmers surfed. It was hypothesized that subjects who predominantly surfed in colder waters had more frequent and more severe exostoses. METHODS: Two hundred two avid surfers (91% male and 9% female, median age 17 years) were included in the study. EAEs were graded based on the extent of external auditory canal patency; grades of normal (100% patency), mild (66% to 99% patency), and moderate-severe (<66% patency) were assigned. Otoscopic findings were correlated with data collected via questionnaires that detailed surfing habits. RESULTS: There was a 38% overall prevalence of EAEs, with 69% of lesions graded as mild and 31% graded as moderate-severe. Professional surfers (odds ratio 3.8) and those subjects who surfed predominantly in colder waters (odds ratio 5.8) were found to be at a significantly increased risk for the development of EAEs. The number of years surfed was also found to be significant, increasing one's risk for developing an exostosis by 12% per year and for developing more severe lesions by 10% per year. Individuals who had moderate-severe EAEs were significantly more likely to be willing to surf in colder waters than were those who had mild EAEs (odds ratio 4.3). CONCLUSIONS: EAEs are more prevalent in cold water surfers, and additional years surfing increase one's risk not only for developing an EAE but also for developing more severe lesions.

Adolescent↗
PubMed1986

The normal summating potential recorded from external ear canal.

With a "plastic leaf" electrode, cochlear summating potential (SP) and auditory nerve action potential (AP) responses to rectangular-pulse clicks were recorded from the ear canal skin surface of 96 normal-hearing ears of 48 subjects. The main goals of this investigation were to develop a more precise characterization of the relationship between SP and AP amplitudes across normal ears and to determine the confidence limits of this relationship so that a more accurate "normal limit" could be established for clinical testing. The results suggest that the across-subjects SP-AP amplitude relationship is linear. Also, SP scatter increases as AP amplitude increases, but the scatter is equalized by log transforming the data. The distance of the SP from the log-transformed SP-AP estimating line in SE ("AP-normalized SP amplitude") was found to be superior to the SP/AP amplitude ratio as a method of adjusting SP to AP amplitude, because the SP/AP ratio varied significantly with AP amplitude both across subjects and with different ear canal electrode positions.

Action Potentials↗
PubMed1992

Chondrocalcinosis of the temporomandibular joint: an external ear canal pseudotumor.

An unusual case of calcium pyrophosphate arthropathy (pseudogout) involving the temporomandibular joint of a 53-year-old woman presented clinically as an ear canal tumor. Further evaluation and surgical exploration disclosed chondrocalcinosis of the temporomandibular joint with involvement of the bones at the left base of the skull. This case report emphasizes the importance of recognizing the lesion by frozen-section examination because excellent results can be obtained by intraoperative curettage of the calcareous deposits and local irrigation with saline solution.

Calcium Pyrophosphate↗