Speech development in patients with bilateral conductive deafness (external ear and middle ear deformities).

Abstract: Paca (Cuniculus paca), one of the largest rodents of the Brazilian fauna, has inherent characteristics of its species which can conribute as a new option for animal experimantation. As there is a growing demand for suitable experimental models in audiologic and otologic surgical research, the gross anatomy and ultrastructural ear of this rodent have been analyzed and described in detail. Fifteen adult pacas from the Wild Animals Sector herd of Faculdade de Ciências Agrárias e Veterinárias, Unesp-Jaboticabal, were used in this study. After anesthesia and euthanasia, we evaluated the entire composition of the external ear, registering and ddescribing the details; the temporal region was often dissected for a better view and detailing of the tympanic bulla which was removed and opened to expose the ear structures analyzed mascroscopically and ultrastructurally. The ear pinna has a triangular and concave shape with irregular ridges and sharp apex. The external auditory canal is winding in its path to the tympanic mebrane. The tympanic bulla is is on the back-bottom of the skull. The middle ear is formed by a cavity region filled with bone and membranous structures bounded by the tympanic membrane and the oval and round windows. The tympanic membrane is flat and seals the ear canal. The anatomy of the paca ear is similar to the guinea pig and from the viewpoint of experimental model has major advantages compared with the mouse ear.

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Squamous Epithelium in the Middle Ear and Sinus

Ear Nose & Throat Journal ◽

10.1177/014556139407300112 ◽

1994 ◽

Vol 73 (1) ◽

pp. 47-48

Author(s):

Alper Tutkun ◽

Caglar Batman ◽

Cüneyt Üneri ◽

Mehmet Ali Sehitoglu

Keyword(s):

Middle Ear ◽

Statistical Difference ◽

Squamous Epithelium ◽

Normal Skin ◽

University Hospital ◽

Control Group ◽

Study Group ◽

External Ear ◽

Ear Canal ◽

Superior Part

This study has been performed between December 1990—March 1991 in the Microsurgery laboratory of the Marmara University Hospital. Twelve healthy albino guinea pigs were used as a study group while the control group consists of three animals. The potentials for cholesteatoma formation of the squamous epithelium, namely the squamous epithelium of the posterior superior part of the external ear canal skin and normal skin, were investigated. Among 24 subjects who were implanted by canal skin, cholesteatoma was fanned in 21 of them. Likewise, 19 of 24 animals implanted by normal skin came out with cholesteatoma formation. Between these two types of epithelium, there is no statistical difference in cholesteatoma formation (p >0.5).

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Side-Hole Suction for Ear Surgery

Otolaryngology ◽

10.1177/019459987908700121 ◽

1979 ◽

Vol 87 (1) ◽

pp. 87-88 ◽

Cited By ~ 2

Author(s):

N. Wendell Todd

Keyword(s):

Soft Tissue ◽

Middle Ear ◽

Surgical Trauma ◽

External Ear ◽

Ear Canal ◽

Ear Surgery ◽

Graft Placement ◽

Side Hole ◽

External Ear Canal

Surgical trauma to the soft tissue of the external ear canal and middle ear increases inflammation and scarring. A side-hole suction tip has been found to minimize suction-tip trauma, preclude the need to aspirate through synthetic sponge or cotton, and facilitate graft placement.

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Traumatic CSF fistula presenting late as a middle ear effusion

The Journal of Laryngology & Otology ◽

10.1017/s0022215100108138 ◽

1989 ◽

Vol 103 (1) ◽

pp. 97-98

Author(s):

J. T. Brandrick

Keyword(s):

Head Injury ◽

Temporal Bone ◽

Middle Ear ◽

Bone Fracture ◽

Late Presentation ◽

Middle Ear Effusion ◽

Temporal Bone Fracture ◽

Conductive Deafness ◽

Serous Otitis Media ◽

Ear Effusion

AbstractCSF otorrhoea is not uncommon following head injury but late presentation is rare. In the case described an unsuspected temporal bone fracture presented after an interval of ten years with a conductive deafness due to fluid in the middle ear simulating serous otitis media.

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External ear canal cholesteatoma after ventilation tube insertion and mastoidectomy

Vojnosanitetski pregled ◽

10.2298/vsp1204363d ◽

2012 ◽

Vol 69 (4) ◽

pp. 363-366 ◽

Cited By ~ 1

Author(s):

Dragoslava Djeric ◽

Milan Jovanovic ◽

Ivan Baljosevic ◽

Srbislav Blazic ◽

Milanko Milojevic

Keyword(s):

Tympanic Membrane ◽

Middle Ear ◽

Membrane Surface ◽

Tube Placement ◽

External Ear ◽

Ventilation Tube ◽

Ear Canal ◽

Tube Insertion ◽

Tissue Mass ◽

External Ear Canal

Introduction. Etiopathogenetically, there are two types of chollesteatomas: congenital, and acquired. Numerous theories in the literature try to explain the nature of the disease, however, the question about cholesteatomas remain still unanswered. The aim of the study was to present a case of external ear canal cholesteatoma (EEC) developed following microsurgery (ventilation tube insertion and mastoidectomy), as well as to point ant possible mechanisms if its development. Case report. A 16-yearold boy presented a 4-month sense of fullness in the ear and otalgia on the left side. A year before, mastoidectomy and posterior atticotomy were performed with ventilation tube placement due to acute purulent mastoiditis. Diagnosis was based on otoscopy examination, audiology and computed tomography (CT) findings. CT showed an obliterative soft-tissue mass completely filled the external ear canal with associated erosion of subjacent the bone. There were squamous epithelial links between the canal cholesteatoma and lateral tympanic membrane surface. They originated from the margins of tympanic membrane incision made for a ventilation tube (VT) insertion. The position of VT was good as well as the aeration of the middle ear cavity. The tympanic membrane was intact and of normal appearance without middle ear extension or mastoid involvement of cholesteatoma. Cholesteatoma and ventilation tube were both removed. The patient recovered without complications and shortly audiology revealed hearing improving. Follow-up 2 years later, however, showed no signs of the disease. Conclusion. There could be more than one potential delicate mechanism of developing EEC in the ear with VT insertion and mastoidectomy. It is necessary to perform routine otologic surveillance in all patients with tubes. Affected ear CT scan is very helpful in showing the extent of cholesteatoma and bony defects, which could not be assessed by otoscopic examination alone.

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Bilateral conductive deafness related to erosive lichen planus

The Journal of Laryngology & Otology ◽

10.1017/s0022215100140472 ◽

1998 ◽

Vol 112 (4) ◽

pp. 365-366 ◽

Cited By ~ 20

Author(s):

Ludovic Martin ◽

Sylvain Moriniere ◽

Marie-Christine Machet ◽

Alain Robier ◽

Loïc Vaillant

Keyword(s):

Hearing Loss ◽

Lichen Planus ◽

Conductive Hearing Loss ◽

External Ear ◽

Conductive Deafness ◽

Erosive Lichen Planus ◽

Conductive Hearing

AbstractA case of bilateral progressive stenosis of both external auditory canals with resultant conductive hearing loss is presented. The stenosis revealed multifocal erosive and synechiant lichen planus. To our knowledge, this is the first reported case of lichen planus involvement of the external ear.

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Eustachian tube teratoma and its terminological correctness

The Journal of Laryngology & Otology ◽

10.1017/s0022215100143774 ◽

1999 ◽

Vol 113 (3) ◽

pp. 271-274 ◽

Cited By ~ 12

Author(s):

Carlos B. Ruah ◽

David Cohen ◽

Jacob Sadé

Keyword(s):

Germ Cell ◽

Eustachian Tube ◽

Middle Ear ◽

World Health ◽

External Ear ◽

Germ Cell Tumours ◽

Review Of The Literature ◽

New Classification ◽

Health Organization

AbstractTeratomas are germ cell tumours usually found in the young and are characteristically composed of tissue foreign to the place where they arise. Two teratomas of the middle ear were first described in 1866 and since then, and to the best of our knowledge, 19 additional cases have been reported in the literature under different terms such as hairy congenital polyps, epidermoid cysts, dermoid cysts, hamartoma, cutaneous teratoma and teratomas. The difficulty in classifying germ cell tumours may explain the different terminologies encountered in the literature. The authors describe a case of teratoma of the eustachian tube presenting as a mass in the middle and external ear of a 10-week-old girl. Using this case, a review of the literature is performed in light of the new classification of germ cell tumours proposed by the World Health Organization (WHO). It is of note that most of the teratomas that present in the middle ear arise from, or involve, the eustachian tube.

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