Temporal Bone Histopathology of Necrotizing External Otitis

Histopathological examination of the temporal bone of an individual with necrotizing external otitis revealed severe inflammation with necrosis in the subcutaneous granulation tissue in the external auditory canal. Erosion of the bony walls of the canal had created a defect in the anterior wall, through which infection spread to the preauricular region. The lateral part of the middle ear cavity was also filled with granulation tissue and purulent exudate. A dehiscence of the horizontal portion of the facial canal had apparently allowed spread of an inflammatory round cell infiltrate along the facial nerve up to the fundus of the internal auditory canal. The only evidence of inner ear pathology was the presence of eosinophilic fluid material in the perilymphatic spaces of the labyrinth. A review of other reports of cases of necrotizing external otitis seems to show that this is the only instance of this disease in which infection spread from the external canal through the tympanic membrane to the middle ear and thence to the internal auditory canal.

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A Study of Middle Cranial Fossa Anatomy and Anatomic Variations

Ear Nose & Throat Journal ◽

10.1177/014556130708600813 ◽

2007 ◽

Vol 86 (8) ◽

pp. 474-481 ◽

Cited By ~ 8

Author(s):

Hamid R. Djalilian ◽

Kunal H. Thakkar ◽

Sanaz Hamidi ◽

Aaron G. Benson ◽

Mahmood F. Mafee

Keyword(s):

Temporal Bone ◽

Internal Auditory Canal ◽

Middle Cranial Fossa ◽

Anterior Wall ◽

High Resolution Computed Tomography ◽

Anatomic Landmarks ◽

Middle Cranial Fossa Approach ◽

Cranial Fossa ◽

Picture Archiving And Communication ◽

Temporal Bones

We conducted a study to establish standardized measurements of the common anatomic landmarks used during surgery via the middle cranial fossa approach. Results were based on high-resolution computed tomography (CT) images of 98 temporal bones in 54 consecutively presenting patients. Measurements were obtained with the assistance of the standard PACS (picture archiving and communication system) software. We found that the superior semicircular canal (SSC) dome was not the highest point on the temporal bone (i.e., the arcuate eminence) in 78 of the temporal bone images (79.6%). Pneumatization above the SSC and above the internal auditory canal (IAC) was found in 27 (27.6%) and 39 (39.8%) temporal bone images, respectively. The anterior wall of the external auditory canal was always anterior to the anterior wall of the IAC. The mean angles between the SSC and the posterior and anterior walls of the IAC were 42.3° and 60.8°, respectively. We also measured other distances, and we compared our findings with those published by others. We hope that the results of our study will help surgeons safely and rapidly locate anatomic landmarks when performing surgery via the middle cranial fossa approach.

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THE VALUE OF NAVIGATION SYSTEM IN COCHLEAR IMPLANTATION IN PATIENTS WITH ABNORMALITIES OF THE INTERNAL AND MIDDLE EAR

Folia Otorhinolaryngologiae et Pathologiae Respiratoriae ◽

10.33848/foliorl23103825-2019-25-3-12-20 ◽

2019 ◽

Vol 25 (3) ◽

pp. 12-20

Author(s):

V.I. Fedoseev ◽

◽

N.A. Mileshina ◽

E.V. Kurbatova ◽

S.S. Osipenkov ◽

...

Keyword(s):

Surgical Treatment ◽

Inner Ear ◽

Temporal Bone ◽

Congenital Malformation ◽

Middle Ear ◽

Navigation System ◽

Cochlear Implantation ◽

Internal Auditory Canal ◽

Mondini Dysplasia ◽

Ct And Mri

The use of navigation system during the coclear implantation (CI) in patients with congenital and acquired malformation of the inner ear is necessary because of surgical difficulties. The purpose of our work is to evaluate the effectiveness of the navigation system in congenital and acquired anomalies of the middle and inner ear. Materials and methods The authors followed-up 27 children with bilateral congenital malformation of the inner ear and 58 patients with acquired cochlea obliteration (12 adults and 46 children with the acquired obliteration were included in the group). 55 patients have the acquired obliteration of the inner ear, 3 patients – the total obliteration of the inner ear. Audiological, CT and MRI were performed. All our patients the CI was performed. Conclusion.The use of navigation system during CI in patients with a combination of malformation of the inner and middle ear to increase the efficiency of surgical treatment. The duration of anesthesia and surgery in children with congenital malformation increases when navigation is applied All patients after meningitis or with the fracture of the temporal bone should be performed MRI The patients with an extension of the internal auditory canal, anomaly of Mondini dysplasia of the cochlear, the partial obliteration of the cochlea have good rehabilitation results after CI. The patients with the total obliteration of the inner ear have unsatisfactory results of rehabilitation.

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Post-stapedectomy reparative granuloma: a misnomer

The Journal of Laryngology & Otology ◽

10.1017/s0022215100133134 ◽

1996 ◽

Vol 110 (2) ◽

pp. 185-188 ◽

Cited By ~ 6

Author(s):

J. E. Fenton ◽

J. Turner ◽

A. Shirazi ◽

P. A. Fagan

Keyword(s):

Giant Cell ◽

Temporal Bone ◽

Middle Ear ◽

Granulation Tissue ◽

Rare Complication ◽

Stapes Surgery ◽

Fat Necrosis ◽

Giant Cell Reparative Granuloma ◽

Histological Assessment ◽

Granulomatous Formation

AbstractThe pathophysiology of so-called ‘reparative granuloma’ occurring after stapedectomy has not been determined and universally accepted management of this rare complication has not yet been established. A case is presented in which a mass developed in the middle ear after the use of a fat/wire prosthesis in a stapedectomy. Histological assessment revealed nonspecific granulation tissue and fat necrosis. It is suggested that ‘reparative granuloma’ is a misnomer as there is no microscopic evidence in this case nor in the literature of granulomatous formation. The condition may follow stapedectomy or stapedotomy. Furthermore, the name leads to confusion with a different condition, giant cell reparative granuloma, which involves the jaws and rarely the temporal bone. An alternative name, ‘Stapes surgery induced granulation tissue’ (SSIG) is therefore suggested for this condition.

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Squamous cell carcinoma of tympano-mastoid region: a series of six cases

International Journal of Otorhinolaryngology and Head and Neck Surgery ◽

10.18203/issn.2454-5929.ijohns20181891 ◽

2018 ◽

Vol 4 (3) ◽

pp. 874

Author(s):

Surender Kumar ◽

Uma Garg ◽

Naveen Sharma ◽

Neha Salaria ◽

Deepak Verma

Keyword(s):

Temporal Bone ◽

Middle Ear ◽

Histopathological Examination ◽

Elderly Persons ◽

Bone Resection ◽

Middle Ear Mucosa ◽

Peripheral Facial Palsy ◽

Soft Tissue Involvement ◽

Nocturnal Pain ◽

Temporal Bone Resection

<p class="abstract">The malignancies of tympanomastoid region are very rare entity. These tumours are more common in elderly persons in 6th and 7th decade. Males are more commonly affected than females. Chronically discharging ears are considered as risk factor which may be due to metaplasia in the middle ear mucosa following prolonged chronic infection. The most common symptoms are long standing blood tinged ear discharge, severe nocturnal pain, rapidly growing polypoidal or granulomatous mass in EAC or middle ear, peripheral facial palsy and painless ulceration over pinna or EAC. CT scan for bony erosion and MRI for soft tissue involvement and neural invasion are investigations of choice. Tissue biopsy is must for histopathological examination and confirmation of diagnosis. Surgery and chemo-radiotherapy are the mainstay of treatment. Surgery includes wide local excision, lateral temporal bone resection, subtotal temporal bone resection and total temporal bone resection.</p><p class="abstract"> </p>

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Anatomy of the Guinea Pig Temporal Bone

Annals of Otology Rhinology & Laryngology ◽

10.1177/000348949210100814 ◽

1992 ◽

Vol 101 (8) ◽

pp. 699-704 ◽

Cited By ~ 29

Author(s):

Nebil Goksu ◽

Nalan Karademir ◽

Rifki Haziroglu ◽

Ismet Bayramoglu ◽

Yusuf Kemaloglu ◽

...

Keyword(s):

Guinea Pig ◽

Temporal Bone ◽

Eustachian Tube ◽

Middle Ear ◽

Guinea Pigs ◽

Experimental Studies ◽

Internal Auditory Canal ◽

Cell System ◽

Advantages And Disadvantages ◽

Temporal Bone Anatomy

The middle ear of guinea pigs has long been used for experimental studies, but no detailed information about its temporal bone anatomy is available. In 18 adult guinea pigs, the temporal bone, eustachian tube, and inner ear anatomy, in addition to the anatomy of the middle ear, were investigated under the dissection microscope. In addition to properties of the eardrum, ossicles, air cell system, and cochlea previously described, the appearance of Huschke's foramen and the crista stapedis in an adult guinea pig ear, the structure of the eustachian tube, the architecture of the internal auditory canal, and the communication of the mastoid cells with the tympanic bulla are described. Differences and similarities among guinea pigs, other experimental animals, and humans are discussed to show the advantages and disadvantages of the guinea pig ear for experimentation.

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Squamous Cell Carcinoma in the Middle Ear. A Case Report and Histopathological Examination of the Temporal Bone.

Practica Oto-Rhino-Laryngologica ◽

10.5631/jibirin.84.731 ◽

1991 ◽

Vol 84 (6) ◽

pp. 731-737

Author(s):

Yasuyuki Ohira ◽

Akira Kodama ◽

Kimitaka Kaga ◽

Hitoshi Yamane

Keyword(s):

Squamous Cell Carcinoma ◽

Case Report ◽

Cell Carcinoma ◽

Temporal Bone ◽

Middle Ear ◽

Squamous Cell ◽

Histopathological Examination

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INTERACTIONS BETWEEN CYSTICERCUS FASCIOLARIS AND COMMON RATS

FLORA AND FAUNA ◽

10.33451/florafauna.v23i2pp453-456 ◽

2017 ◽

Vol 23 (2) ◽

Author(s):

SHASHI KIRAN

Keyword(s):

Granulation Tissue ◽

Larval Stage ◽

Histopathological Examination ◽

Sylvatic Cycle ◽

Mature Larva ◽

Hepatic Cysts ◽

Cysticercus Fasciolaris ◽

Taenia Taeniaeformis ◽

Relationship Of ◽

The Relationship

The objective of this study was to determine the relationship of C. fasciolaris with common rats. Cysticercus fasciolaris is the larval stage of Taenia taeniaeformis . Development of metacestodes ( Cysticercus fasciolaris) occur in the liver of rodents. An urban and a sylvatic cycle occurs. A total of 40 liver specimens of rats were examined. Histopathological examination revealed the presence of multiple hepatic cysts, and the C. fasciolaris larva was surrounded by granulation tissue. Large and separated ûbroblasts in different orientations with some neoplastic changes were seen in advanced hepatic cysticercosis. The bladder involved the larva and large chamber containing the small chamber and opalescent fluid. The scolex of the mature larva is distinctly large, bearing four lateral distinct suckers, a rostellum armed with double, and alternating rows of hooks.

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