Heterotopic Brain in the Middle Ear

Klein, Madelyne; Schwaighofer, B.; Sobel, David F.; Fantozzi, Richard D.; Hesselink, John R.

doi:10.1097/00004728-198911000-00020

Cited by 22 publications

(28 citation statements)

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“…Neuroglial heterotopias and encephalocoeles of the middle-ear region are often associated with a previous history A commonly accepted theory of brain heterotopia states that it is a variant of an encephalocoele in which a pedicle, directly connecting the neuroglial tissue with the subarachnoid or ventricular spaces, has detached and has eventually been absorbed or become vestigial. 1 Unrecognized remote trauma can also be considered. 9 In this case, although there was a bony defect at the tegmen tympani, the dura was intact and a connection with the central nervous system was not established.…”

Section: Discussionmentioning

confidence: 99%

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Glial heterotopia of the middle ear

Uğuz¹,

Arslanoğlu²,

Terzi³

et al. 2007

J. Laryngol. Otol.

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Section: Discussionmentioning

confidence: 99%

“…Heterotopic brain tissue must be distinguished from cholesteatoma, teratoma and true neoplasms such as glioma, meningioma, neuroma and schwannoma. 1,7,9 Although neuroglial heterotopias of the middle ear are rare, they should be considered in the differential diagnosis of middle-ear masses. …”

Section: Discussionmentioning

confidence: 99%

Glial heterotopia of the middle ear

Uğuz¹,

Arslanoğlu²,

Terzi³

et al. 2007

J. Laryngol. Otol.

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“…Si tratta di normali cellule cerebrali fornite di stroma fibrosa 45 • La cassa timpanica risulta apparentemente intatta.…”

Section: Eterotopia Cerebrateunclassified

Patologia espansiva della regione temporale e petromastoidea

Schiavoni

2000

Rivista di Neuroradiologia

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RIASSUNTO -L'Autore ha cercato di riassumere l'ampio spettro della patologia espansiva che colpisce l'osso temporale, la piramide petrosae la mastoide corroborando la descrizione con casistica personale. Per semplicita si e ritenuto opportuno suddividere tale trattazione seguendo uno schema anatomo-topografico piu caro agli otorinolaringoiatri per cui e stata descritta prima la patologia dell'orecchio esterno, poi dell'orecchio medio e infine di quello interno considerando in ogni contesto le lesioni spazio occupanti piu frequenti e i loro caratteri distintivi e differenziali. Alcune patologie non sono state descritte diffusamente perche meglio trattate in altra letteratura o per evitare ripetizioni nel testo, ma di tutte si e cercato di chiarire i caratteri che ne consentano il riconoscimento.SUMMARY -The temporal and petromastoid region presents special morphostructural features which hinder the recognition and identification of locoregional disease. The advent of CT and MR has opened up major new diagnostic possibilities because they allow the direct study of disease and are an essential complement to other imaging techniques (traditional x -ray, scintigraphy, digital angiography) providing additional information for the purposes of differential diagnosis. CT and MR are complementary techniques: the choice of one or the other as the first examination will depend on circumstances and clinical urgency. Modern imaging systems display millimetric layers and there is little difference between CT and MR resolution apart from images of bony structures which are better displayed at CT Table 1 lists the characteristics and respective advantages of the two techniques. IntroduzioneLa diagnosi differenziale tra le varie forme di patologia a carattere espansivo che puo interessare le regioni temporale e petromastoidea puo a volte essere indaginosa; il neuroradiologo deve fornire allo specialista tutte le informazioni che consentano una corretta impostazione terapeutica. Si deve comunque tenere presente che, malgrado da tempo siano disponibili apparecchiature TC e RM con caratteristiche tecniche e programmi di elaborazione sofisticati, permane ancora un margine di incertezza diagnostica rappresentato da patologia con caratteristiche di densita e segnale border-line e pertanto inquadrabili con difficolta.Anche se e sempre piu diffusa la tendenza a ricorrere preliminarmente alle indagini TC e RM nel contesto dei piu diversi iter diagnostici, purtuttavia non va trascurato il valore informativo derivante da una corretta e mirata indagine radiografica tradizionale (per motivi di radioprotezione si tende ad abbandonare lo studio stratigrafico mono e pluridirezionale ), dall'esecuzione di un'ecografia o di una scintigrafia con marcatori selettivi. Un bilancio angiografico globale della regione di interesse con tecnica digitalizzata e cateterismo 397

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“…Heterotopic brain tissue is defined as a mass-like lesion composed of mature brain tissue isolated from the cranial cavity or spinal cord (1). It usually occurs in the brain and extracranial midline structures, including the nose (2), nasopharynx, oropharynx, soft palate (3), lip, and tongue (4).…”

Section: Introductionmentioning

confidence: 99%

“…Rarely, heterotopic brain tissue has been reported to occur in the extracranial non-midline locations such as scalp, orbit, eye, lung, diaphragm, peritoneum, skin, temporal bone, uterine cervix, and endometrium. Although many choristomas of the salivary gland origin have been reported in the middle ear and mastoid (5, 6), heterotopic brain tissue is very uncommon in this region (1, 7-10). We herein describe a case of glial choristoma involving the middle ear and mastoid bone with a review of the literature.…”

Section: Introductionmentioning

confidence: 99%

Glial Choristoma in the Middle Ear and Mastoid Bone: A Case Report

et al. 2004

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Heterotopic brain tissue usually involves extracranial midline structures of the head and neck such as nose, nasopharynx, and oral cavity. Its occurrence in the non-midline structures, including middle ear, is rare. We described a 50-yr-old-man with heterotopic glial tissue in the middle ear and mastoid bone. The patient presented with progressive hearing loss for 8 yr. There was no history of congenital anomalies, trauma, or ear surgery. Computed tomography revealed a mass-like lesion with soft tissue density occupying the middle ear cavity and mastoid antrum. At the operation, a graywhite fibrotic mass was detected in the epitympanic area. Mesotympanum and ossicles were intact. The patient underwent left simple mastoidectomy with type I tympanoplasty. During operation, definite cranial bone defect or cerebrospinal fluid leakage was not found. Histologically, the lesion was composed of exclusively mature, disorganized glial tissue with fibrovascular elements in a rather loose fibrillary background. Glial tissue showed diffuse positive reaction for glial fibrillar acidic protein and S100 protein on immunohistochemical study.

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Heterotopic Brain in the Middle Ear

Cited by 22 publications

References 0 publications

Glial heterotopia of the middle ear

Glial heterotopia of the middle ear

Patologia espansiva della regione temporale e petromastoidea

Glial Choristoma in the Middle Ear and Mastoid Bone: A Case Report

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