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1.
Acta otorrinolaringol. esp ; 74(4): 239-242, Julio - Agosto 2023. ilus, tab
Artigo em Inglês | IBECS | ID: ibc-223483

RESUMO

Introduction To study the accuracy of high-resolution computed tomography (HRCT) for assessing the ossicular structures in cadaveric temporal bone by the distance between temporal bone elements is of great interest. Objectives To record the distances between the malleal neck and both the stapedial head and footplate by HRCT. Further, after partially opening the temporal bone toward the ossicular structure, to record the actual distances between those structures during surgical dissection. Material and methods This study compared actual and HRCT measurements of cadaveric temporal bone. We studied, measured, and recorded distances within and between various structural elements. All data are reported as means and were analyzed to prove the accuracy of HRCT to assess ossicular structure from the temporal bone. Results This study included the temporal bones of 10 male and 10 female cadavers (mean age, 70.4 years). By surgical dissection, the distances between the malleal neck and the stapedial head and footplate were 3.40 and 5.30 mm, respectively (measured from the bone); by HRCT, the corresponding values were 3.35 and 5.29 mm. The intraclass correlation coefficients for assessing ossicular structure in contrast to the actual measurements were 0.901 (malleal neck to stapedial head) and 0.923 (malleal neck to stapedial footplate) (p < 0.05). There were no differences between the actual malleal neck to stapedial head (p = 0.793) or footplate (p = 0.242) measurements. Conclusion HRCT produced statistically comparable, reliable, and accurate measurements compared with actual measurements in cadaveric temporal bone. (AU)


Assuntos
Humanos , Masculino , Feminino , Pacientes , Estribo , Bigorna , Osso Temporal , Cadáver
2.
Acta otorrinolaringol. esp ; 73(6): 394-405, noviembre 2022. ilus
Artigo em Espanhol | IBECS | ID: ibc-212357

RESUMO

La tomografía computarizada del hueso temporal es una prueba de imagen fundamental para el diagnóstico y tratamiento de diversas entidades que afectan a esta compleja estructura. La tomografía computarizada permite una representación más detallada de las estructuras óseas que la resonancia magnética, lo que determina que sea la prueba de elección para la planificación de la cirugía otológica.El objetivo de este trabajo es el de elaborar una lista de verificación o checklist que permita al otorrinolaringólogo estudiar y valorar de forma sistemática y organizada las principales estructuras de referencia, variantes anatómicas y cambios posquirúrgicos más frecuentes antes de una cirugía segura.Esta revisión ha sido promovida por la Sociedad Española de Otorrinolaringología y redactada en un formato de lista de verificación dividida en las diferentes regiones del hueso temporal y base de cráneo lateral. (AU)


Computed tomography scan of the temporal bone is a fundamental imaging modality for both the diagnosis and treatment of a wide range of pathologies affecting this complex structure. Temporal bone computed tomography scan provides a more detailed depiction of bone structures, compared with magnetic resonance imaging and, for this reason computed tomography scan is the imaging modality of choice in the planning of otological surgery.The aim of this article is to present a checklist to allow the otolaryngologist to assess systematically and in an organized manner the main anatomical landmarks, anatomical variants, as well as the most common postoperative surgical changes, which can be identified before any safe otological surgery.This revision was promoted by the Spanish Society of Otolaryngology and elaborated in a checklist template divided into the different areas of the temporal bone and the lateral skull base. (AU)


Assuntos
Humanos , Imagem por Ressonância Magnética de Flúor-19 , Base do Crânio/diagnóstico por imagem , Osso Temporal/diagnóstico por imagem , Lista de Checagem , Tomografia
4.
Radiología (Madr., Ed. impr.) ; 64(3): 206-213, May-Jun 2022. ilus, tab
Artigo em Espanhol | IBECS | ID: ibc-204578

RESUMO

Objetivos: Valorar la calidad de imagen y la dosis de radiación en tomografía computarizada (TC) de peñascos adquiridos con una TC multidetector (TCMD) con filtro de estaño, detectores de alta resolución y reconstrucción iterativa, comparándola con otro equipo sin filtro de estaño y con reconstrucción por retroproyección filtrada. Material y métodos: Se incluyeron retrospectivamente 32 pacientes con TC de peñascos, realizadas con dosis ultrabaja en una 32-TCMD (130 kV con filtro de estaño y reconstrucción iterativa). Se compararon con 36 estudios realizados en una 16-TCMD (120 kV y retroproyección filtrada). Se cuantificó la densidad muscular, ósea y el ruido de fondo, y se calculó la relación señal/ruido. Para valorar la calidad de imagen, dos radiólogos evaluaron de forma subjetiva e independiente la visualización de las diferentes estructuras del oído (0=no se visualiza; 3=se identifica y delimita perfectamente). Se calculó el coeficiente de concordancia interobservador kappa. Utilizando un software comercial, se cuantificó a diferentes niveles anatómicos la dosis efectiva con el producto dosis-longitud. Resultados: En el análisis cuantitativo de las imágenes no se observaron diferencias significativas en el ruido de fondo. En el análisis cualitativo se obtuvo una puntuación subjetiva similar o ligeramente menor en la delimitación de las diferentes estructuras de la cadena osicular y cóclea en la 32-TCMD, con diferencias estadísticamente significativas. La dosis media efectiva fue de 0,16±0,04 mSv para la 32-TCMD frente a 1,25±0,30 mSv para la 16-TCMD. Conclusiones: La utilización de equipos con filtro de estaño, detectores de alta resolución y reconstrucción iterativa permiten obtener TC con dosis de radiación ultrabaja (0,16±0,04 mSv) con una calidad de imagen adecuada para valorar las estructuras de los peñascos.(AU)


Objectives: To compare image quality and radiation dose in computed tomography (CT) studies of the petrous part of the temporal bone done with a scanner using a tin filter, high-resolution detectors, and iterative reconstruction versus in studies done with another scanner without a tin filter using filtered back projection. Material and methods: This retrospective study compared CT studies in 32 patients who underwent ultralow-dose CT of the petrous part of the temporal bone in a 32-detector CT scanner (130 kV with a tin filter and iterative reconstruction) and in 36 patients who underwent the studies in a 16-detector CT scanner (120 kV and filtered back projection). We quantified the densities of muscle and bone tissues and background noise, and we calculated the signal-to-noise ratio. To evaluate image quality, two radiologists working independently subjectively evaluated the visualization of the different structures of the ear on a four-point scale (0=not visible; 3=perfectly identifiable and delimited), and we calculated the coefficient of interobserver concordance (k). Using commercial software, we quantified the effective dose of radiation at different anatomic levels with the dose-length product. Results: In the quantitative analysis, no significant differences were observed in background noise. In the qualitative analysis, the score on the subjective evaluation was similar or slightly lower for the delimitation of the different structures in the ossicular chain and cochlea in the studies done with the 32-detector scanner, with statistically significant differences. The mean effective dose of radiation was 0.16±0.04 mSv for the 32-detector scanner versus 1.25±0.30 mSv for the 16-detector scanner.(AU)


Assuntos
Humanos , Tomografia Computadorizada por Raios X , Doses Mínimas , Estanho , Osso Petroso , Osso Temporal , Radiologia
5.
Acta otorrinolaringol. esp ; 72(5): 295-304, septiembre 2021. ilus, tab, graf
Artigo em Espanhol | IBECS | ID: ibc-207617

RESUMO

Introducción: El diagnóstico de las fracturas del hueso temporal (FHT) se basa en la imagen radiológica. La clasificación más utilizada divide las fracturas en longitudinales, transversales y mixtas. En los últimos años han surgido otras clasificaciones con el objeto de predecir mejor las manifestaciones clínicas.ObjetivosRevisar las imágenes de tomografía computarizada (TC) del hueso temporal, definir su patrón radiológico según la clasificación tradicional y estudiar la concordancia interobservador de los hallazgos encontrados con los descritos en el informe radiológico. Analizar la asociación entre los tipos de fractura y los hallazgos clínicos. Estudiar el impacto de la neumatización mastoidea en las características de la fractura.Materiales y métodosEstudio retrospectivo de 110 FHT diagnosticadas mediante TC entre enero de 2016 y mayo 2019.ResultadosSe identificaron 52 fracturas transversales (47%), 34 longitudinales (30%) y 19 mixtas (17%) con buena concordancia interobservador (k = 0,637). Las fracturas longitudinales se asociaron con hipoacusia de transmisión (p < 0,001) y las transversales con hipoacusia neurosensorial (p = 0,005). El 8,2% de las fracturas presentaron afectación de cápsula ótica y se asociaron con hipoacusia neurosensorial (p < 0,001), parálisis facial (p = 0,019) y vértigo (p = 0,035). Las fracturas fueron más frecuentes en los casos de mayor neumatización, y la afectación de cápsula ótica en casos de muy buena neumatización (p = 0,024). (AU)


Introduction: The diagnosis of temporal bone fractures (TBF) is based on radiological imaging. The most widely used classification divides fractures into longitudinal, transverse, and mixed. In recent years, other classifications have emerged to better predict clinical manifestations.ObjectivesTo review computed tomography (CT) images of TBF, define their radiological pattern, and study the concordance of the observed findings with those described in the radiological report. To analyse the association between fracture types and clinical findings. To study the impact of mastoid pneumatization on fracture characteristics.MethodsRetrospective study of 110 TBF diagnosed with CT between January 2016 and May 2019.ResultsFifty-two transverse (47%), 34 longitudinal (30%), and 19 mixed fractures (17%) were identified with good interobserver agreement (k = .637). Longitudinal fractures were associated with conductive hearing loss (p < .001) and transverse fractures with sensorineural hearing loss (p = .005). Of the fractures, 8.2% showed involvement of the otic capsule, and were associated with sensorineural hearing loss (p < .001), facial paralysis (p = .019) and vertigo (p = .035). Fractures were more frequent in cases of greater pneumatization, and the involvement of the otic capsule in cases of very good pneumatization (p = .024). (AU)


Assuntos
Humanos , Orelha Interna , Osso Temporal/diagnóstico por imagem , Tomografia Computadorizada por Raios X , Estudos Retrospectivos , Pacientes
6.
Neurología (Barc., Ed. impr.) ; 36(6): 412-417, julio-agosto 2021. tab, ilus
Artigo em Espanhol | IBECS | ID: ibc-219907

RESUMO

Objetivos: El dolor orofacial y cervical es un motivo de consulta frecuente, y puede deberse a múltiples procesos patológicos. Entre ellos se encuentra el síndrome de Eagle, entidad muy infrecuente cuyo origen se atribuye a una osificación del ligamento estilohioideo o una elongación de la apófisis estiloides. Presentamos una serie de cinco pacientes con dicho diagnóstico.Material y métodosSe describen las características demográficas y clínicas de cinco pacientes atendidos en la Unidad de Cefaleas de dos hospitales terciarios por un cuadro compatible con síndrome de Eagle, y su respuesta a distintos tratamientos.ResultadosSe trata de tres varones y dos mujeres de entre 24 y 51 años, con dolor de localización predominante en un oído y la región amigdalina ipsilateral, de cualidad sorda y de gran intensidad. En todos ellos el patrón temporal era crónico y continuo, con exacerbaciones desencadenadas por la deglución. Cuatro pacientes habían realizado múltiples consultas en servicios de otorrinolaringología, y uno de ellos había recibido tratamiento antibiótico ante la sospecha de tubaritis. En todos los casos la palpación de la fosa amigdalina resultó dolorosa. En tres de los pacientes se demostró elongación de la apófisis estiloides y/o calcificación del ligamento estilohioideo mediante tomografía computarizada. Cuatro mejoraron con tratamiento neuromodulador (duloxetina, gabapentina, pregabalina) y solo uno precisó cirugía con escisión de la apófisis estiloides.ConclusionesEl síndrome de Eagle es una causa de dolor craneofacial poco frecuente y posiblemente infradiagnosticada. Aportamos cinco nuevos casos que permiten delimitar tanto la semiología como los posibles tratamientos. (AU)


Objectives: Orofacial and cervical pain are a frequent reason for neurology consultations and may be due to multiple pathological processes. These include Eagle syndrome (ES), a very rare entity whose origin is attributed to calcification of the stylohyoid ligament or elongation of the temporal styloid process. We present a series of five patients diagnosed with ES.Material and methodsWe describe the demographic and clinical characteristics and response to treatment of 5 patients who attended the headache units of two tertiary hospitals for symptoms compatible with Eagle syndrome.ResultsThe patients were three men and two women aged between 24 and 51, presenting dull, intense pain, predominantly in the inner ear and the ipsilateral tonsillar fossa. All patients had chronic, continuous pain in the temporal region, with exacerbations triggered by swallowing. Four patients had previously consulted several specialists at otorhinolaryngology departments; one had been prescribed antibiotics for suspected Eustachian tube inflammation. In all cases, the palpation of the tonsillar fossa was painful. Computed tomography scans revealed an elongation of the styloid process and/or calcification of the stylohyoid ligament in three patients. Four patients improved with neuromodulatory therapy (duloxetine, gabapentin, pregabalin) and only one required surgical excision of the styloid process.ConclusionsEagle syndrome is a rare and possibly underdiagnosed cause of craniofacial pain. We present five new cases that exemplify both the symptoms and the potential treatments of this entity. (AU)


Assuntos
Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Cervicalgia/tratamento farmacológico , Cervicalgia/terapia , Ossificação Heterotópica/diagnóstico , Osso Temporal/anormalidades , Osso Temporal/diagnóstico por imagem , Tomografia Computadorizada por Raios X
7.
Neurocirugía (Soc. Luso-Esp. Neurocir.) ; 32(3): 134-141, mayo- jun. 2021. ilus
Artigo em Espanhol | IBECS | ID: ibc-222559

RESUMO

El carcinoma epidermoide del conducto auditivo es una entidad derivada del estrato espinocelular, es una neoplasia poco frecuente, con baja incidencia presentándose uno a seis casos por millón de habitantes, por lo cual existe poca información bibliográfica sobre esta patología. La clínica de presentación del cáncer de hueso temporal usualmente es inespecífica, por lo que su diagnóstico es siempre tardío. El diagnóstico definitivo requiere de biopsia de la lesión para estudio histopatológico e inmunohistoquímico y así poder establecer el comportamiento y el grado de diferenciación. Presentamos a continuación el caso de una paciente adulta con antecedente clínico de osteoporosis, diagnosticada con otitis media crónica de oído izquierdo de años de evolución, acompañada de secreción purulenta del mismo que no respondió a múltiples esquemas de tratamiento. Cursó con cefalea de predominio temporal izquierdo refractaria a analgesia convencional. En tomografía computarizada de cráneo se evidenció lesión osteolítica del hueso temporal izquierdo con invasión hacia duramadre. Tras resección y toma de biopsia de la lesión se confirma carcinoma epidermoide moderadamente diferenciado (AU)


Squamous cell carcinoma of the ear canal is an entity that arises from the stratum spinosum; it is a rare neoplasm, with a low incidence presenting 1 to 6 cases per million inhabitants, so there is little literature on this pathology. The clinical presentation of temporal bone cancer is usually nonspecific, meaning that its diagnosis is always a late-stage discovery. The definitive diagnosis requires biopsy of the lesion for histopathological and immunohistochemical study to establish the behaviour and the degree of differentiation. We present the case of an adult female patient with a clinical history of osteoporosis, diagnosed with chronic otitis media of the left ear of years of evolution, accompanied by purulent secretion of the same ear that did not respond to multiple treatment regimens. The patient also presented with a headache of left temporal predominance refractory to conventional analgesia. Cranial CT scans showed an osteolytic lesion of the left temporal bone with dural invasion. After resection and biopsy of the lesion, moderately differentiated squamous cell carcinoma was confirmed (AU)


Assuntos
Humanos , Feminino , Idoso , Neoplasias de Células Escamosas/diagnóstico , Neoplasias de Células Escamosas/cirurgia , Neoplasias da Orelha/diagnóstico , Neoplasias da Orelha/cirurgia , Osso Temporal/diagnóstico por imagem , Otite Média , Invasividade Neoplásica , Doença Crônica
8.
Eur. j. anat ; 24(3): 249-256, mayo 2020. tab, ilus, graf
Artigo em Inglês | IBECS | ID: ibc-191475

RESUMO

The lateral pterygoid muscle is a chewing muscle that is found bilaterally in the cranial region. Anatomically, the lateral pterygoid muscle is made up of two bellies, an upper belly and a lower belly. Its anatomical description present in the scientific lit-erature showed that there is an anatomical differ-ence or variation, mainly the insertions of the up-per belly of the lateral pterygoid muscle at the level of the temporomandibular joint, and specifically in the disc and articular condyle, although distribu-tions are reported similarly. They are not entirely accurate in smaller quantities: some articles re-ported variations in the insertion of the lower belly and others the appearance of a third belly of the lateral pterygoid muscle or medial belly. As men-tioned above, a high number of studies that presented some type of lateral pterygoid muscle vari-ation was associated with some type of temporo-mandibular disorders of the joint or some of its in-tra or extra-articular components. A review of the literature in scientific databases was carried out after the selection of the scientific articles, which were analyzed in full text, and the relationship between the anatomy of the lateral pterygoid muscleand the temporomandibular disorders was sought


No disponible


Assuntos
Humanos , Variação Anatômica , Músculos Pterigoides/anatomia & histologia , Articulação Temporomandibular/anatomia & histologia , Transtornos da Articulação Temporomandibular , Algoritmos , Côndilo Mandibular/anatomia & histologia , Disco da Articulação Temporomandibular/anatomia & histologia , Osso Temporal/anatomia & histologia
9.
Acta pediatr. esp ; 78(3/4): e175-e177, mar.-abr. 2020. ilus, tab
Artigo em Espanhol | IBECS | ID: ibc-202530

RESUMO

INTRODUCCIÓN: La histiocitosis es una patología infrecuente consistente en una proliferación incontrolada y acumulación de células de Langerhans, más frecuente en hueso con una clínica poco específica. El número y tipo de órganos afectados es lo que marca la clasificación y la necesidad de tratamiento quimioterápico en esta patología. Caso clínico 1: Presentamos un caso de histiocitosis ósea que es interpretado inicialmente como hematoma. Caso clínico 2: Presentamos un caso de histiocitosis ósea que debuta como otorrea de 4 semanas de evolución, siendo diagnosticada al inicio de otitis purulenta. CONCLUSIONES: A pesar de su rareza, la histiocitosis es una enfermedad a tener en cuenta al evaluar la persistencia de lesiones, tumoraciones o patología que en un primer momento puede parecer banal. Los avances respecto al conocimiento de la patogénesis de esta enfermedad y el descubrimiento de genes implicados abren el camino a nuevas terapias dirigidas


INTRODUCTION: Histiocytosis is an uncommon pathology, consisting of an uncontrolled proliferation and accumulation of Langerhans cells. It most often affects the bones with an unspecified clinical presentation. The amount and kind of affected organs is what marks the classification and the necessity of chemotherapy treatment in this pathology. Clinical case 1: We present a case of histiocytosis of bone initially interpreted as an hematoma. Clinical case 2: We present a case of histiocytosis of bone which starts as an otorrhea lasting 4 weeks. It was diagnosed at the beginning with purulent otitis. CONCLUSIONS: Despite its infrequency, histiocytosis is a disease that should be considered when assessing the persistence of lesions, tumors or pathology that may initially seem banal. Advances in the knowledge of the pathogenesis of this disease and the discovery of the genes involved open the way to new targeted therapies


Assuntos
Humanos , Masculino , Feminino , Lactente , Histiocitose de Células de Langerhans/diagnóstico , Doenças Ósseas/diagnóstico , Osso Temporal/diagnóstico por imagem , Fossa Craniana Média/diagnóstico por imagem , Histiocitose de Células de Langerhans/tratamento farmacológico , Vimblastina/uso terapêutico , Antineoplásicos Fitogênicos/uso terapêutico , Corticosteroides/uso terapêutico , Biópsia , Tomografia Computadorizada por Raios X , Imageamento por Ressonância Magnética , Doenças Ósseas/tratamento farmacológico , Histiocitose de Células de Langerhans/classificação
10.
SEMERGEN, Soc. Esp. Med. Rural Gen. (Ed. Impr.) ; 46(2): 136-139, mar. 2020. ilus
Artigo em Espanhol | IBECS | ID: ibc-195632

RESUMO

El síndrome de Eagle es una entidad nosológica infrecuente, descrita en 1937 por W. Eagle, secundaria a la elongación de la apófisis estiloides y/o a la calcificación del ligamento estilohioideo. Aunque en la mayoría de las ocasiones cursa asintomática, la presión que ejerce esta estructura alterada desde el punto de vista anatómico contra zonas vecinas puede desencadenar una gran variedad de síntomas. Genera un error diagnóstico frecuente que motiva múltiples interconsultas a distintos profesionales, por lo que el profesional debe tenerlo en cuenta en los casos de dolor en la región maxilofacial sin una etiología clara. Presentamos el caso de una paciente de 63años de edad en que la sintomatología única era una neuralgia occipital invalidante, con visitas a numerosos facultativos. La tomografía computarizada en haz de cono 3D (CBCT) confirmó la sospecha clínica. Como tratamiento se realizó la resección parcial de ambas apófisis estiloides


Eagle's syndrome is rare condition described in 1937 by W. Eagle, and is secondary to the elongation of the styloid process and/or calcification of the stylohyoid ligament. Although it occurs asymptomatically in the majority of cases, the pressure exerted by this alternative structure from an anatomical point of view against the neighbouring areas can trigger a great variety of symptoms. It is often wrongly diagnosed, leading to multiple interconsultations with different professionals. This means that the professional must take it into account in those cases of pain in the maxillofacial region without any clear aetiology. The case is presented of a 63year-old patient in whom the only symptom was an invalidating occipital neuralgia, with visits to numerous physicians. A 3-dimension cone beam computed tomography (CBCT) confirmed the clinical suspicion. The treatment consisted of partial resection of both styloid processes


Assuntos
Humanos , Feminino , Pessoa de Meia-Idade , Tomografia Computadorizada de Feixe Cônico , Neuralgia/etiologia , Ossificação Heterotópica/diagnóstico , Osso Temporal/anormalidades , Imageamento Tridimensional , Neuralgia/diagnóstico por imagem , Ossificação Heterotópica/diagnóstico por imagem , Ossificação Heterotópica/cirurgia , Primeiros Socorros , Osso Temporal/diagnóstico por imagem , Osso Temporal/cirurgia
11.
Eur. j. anat ; 24(1): 31-35, ene. 2020. ilus, tab
Artigo em Inglês | IBECS | ID: ibc-186062

RESUMO

The foramen tympanicum, also known as the foramen of Huschke (FH), is a permanent anatomical variation situated in the anteroinferior section of the external auditory canal, posteromedial to the temporomandibular joint. The aim of the study is to determine the prevalence of the FH in Cleft Lip and Palate (CL/P) patients, compared to healthy individuals by using Cone Beam Computed Tomography (CBCT) data. We retrospectively analyzed the CBCT images of 272 individuals, who had been referred to our Oral and Maxillofacial Radiology clinic various reasons. For comparison, 226 randomly selected healthy individuals and 46 CL/P patients (35 unilateral and 11 bilateral) were evaluated. FH in 35 (12.9%) of the 272 individuals; 26 of them healthy individuals, 9 of them CL/P patients. The FH was higher in patients with CL/P (19.6%) than healthy individuals (11.5%). Clinicians should be aware of the variability of TME and especially the FH in the ear region when radiographically examining these sites prior to CL/P surgery to prevent postoperative reconstruction and complications. Moreover, to evaluate these anatomical variations, CBCT


No disponible


Assuntos
Humanos , Fenda Labial/diagnóstico por imagem , Palato/diagnóstico por imagem , Variação Anatômica , Maxila/anatomia & histologia , Maxila/diagnóstico por imagem , Osso Temporal/diagnóstico por imagem , Palato/anatomia & histologia , Estudos Retrospectivos , Osso Temporal/anatomia & histologia , Tomografia Computadorizada de Feixe Cônico/instrumentação
12.
Eur. j. anat ; 23(6): 435-446, nov. 2019. ilus, tab
Artigo em Inglês | IBECS | ID: ibc-185086

RESUMO

Thorough knowledge of the variation of intrahepatic course of the portal vein is essential for pre-operative assessment of various hepatic surgeries like hepatectomy and live donor liver transplant. This study aims to determine the variation in the branching pattern of the portal vein in South Indian population. The branching pattern of the portal vein was studied by 3D reconstruction of 100 contrast-enhanced computed tomography images and in 15 formalin fixed livers using modified luminal casting technique. Radiologically, the normal portal vein anatomy was seen in 89%. The most common variation was trifurcation of portal vein (5%). A rare anomaly was noted in one case where the left portal vein gave a branch to segment VII. Using the modified luminal casting technique all the 15 specimens displayed Type I portal vein anatomy. The most common variation in the intrahepatic branching pattern observed was the right posterior segmental division supplying segment VIII. A rare left portal vein variation, in which it gave branches to segments V and VIII was noted. In this study, variations in the segmental supply of the portal vein were observed, which have not been studied in detail previously in the Indian population. Variations on the left portal vein are infrequent. A prior knowledge of such variations will help the interventional radiologists to reduce misinterpretations and subsequent misdiagnosis and guide the hepatobiliary


No disponible


Assuntos
Humanos , Masculino , Feminino , Pessoa de Meia-Idade , Idoso , Idoso de 80 Anos ou mais , Nervo Facial/anatomia & histologia , Nervo Facial/diagnóstico por imagem , Orelha Média/anatomia & histologia , Dissecação/métodos , Cadáver , Osso Temporal/anatomia & histologia , Deiscência da Ferida Operatória/diagnóstico por imagem , Orelha Média/diagnóstico por imagem , Anatomia/educação , Reabsorção Óssea/patologia
16.
Radiología (Madr., Ed. impr.) ; 61(3): 204-214, mayo-jun. 2019. ilus, tab
Artigo em Espanhol | IBECS | ID: ibc-185292

RESUMO

La fractura de peñascos constituye una lesión común de la base del cráneo, y la mayoría son el resultado de traumatismos de alta energía. Su reconocimiento en politraumatizados puede realizarse en las tomografías computarizadas de cráneo y cervicales. Los hallazgos directos e indirectos suelen ser suficientes para establecer el diagnóstico. Su identificación es importante debido a que el hueso temporal contiene estructuras críticas, y es posible errar debido a la complejidad de esta región, y su insuficiente vigilancia. Este trabajo revisa los puntos clave anatómicos, la sistematización de los hallazgos radiológicos y las clasificaciones usadas en fracturas de hueso temporal. Cobra relevancia la identificación y descripción de los hallazgos relativos a estructuras importantes de esta región, la búsqueda de fracturas no visibles sospechadas por signos indirectos, y la identificación de estructuras anatómicas que pueden simular fracturas. Pierden valor las clasificaciones clásicas, aunque siguen condicionando el manejo terapéutico


Fractures of the petrous part of the temporal bone are a common lesion of the base of the skull; most of these fractures result from high-energy trauma. In patients with multiple trauma, these injuries can be detected on CT scans of the head and neck, where the direct and indirect signs are usually sufficient to establish the diagnosis. It is important to these fractures because the temporal bone has critical structures and the complexity of this region increases the risk of error unless special care is taken. This article reviews the key anatomical points, the systematization of the imaging findings, and the classifications used for temporal bone fracture. We emphasize the usefulness of identifying and describing the findings in relation to important structures in this region, of looking for unseen fractures suspected through indirect signs, and of identifying anatomical structures that can simulate fractures. We point out that the classical classifications of these fractures are less useful, although they continue to be used for treatment decisions


Assuntos
Humanos , Traumatismos Craniocerebrais/diagnóstico por imagem , Traumatismos do Nervo Facial/diagnóstico por imagem , Ossículos da Orelha/lesões , Lesões das Artérias Carótidas/diagnóstico por imagem , Osso Temporal/diagnóstico por imagem , Traumatismo Múltiplo/diagnóstico por imagem , Perda Auditiva/etiologia
17.
Radiología (Madr., Ed. impr.) ; 60(2): 119-127, mar.-abr. 2018. tab, ilus
Artigo em Espanhol | IBECS | ID: ibc-174072

RESUMO

Objetivo. La hipoacusia es la complicación más frecuente del traumatismo del hueso temporal. El papel del radiólogo es de gran importancia; la adecuación y la selección de las pruebas radiológicas, así como su correcta interpretación, son cruciales para establecer el diagnóstico y el pronóstico, y para seleccionar el tratamiento idóneo. Con el objetivo de sistematizar los conceptos más relevantes en la valoración de los estudios de imagen en este contexto, se esquematizará el desarrollo del tema según el tipo de hipoacusia que condicione el traumatismo. De forma ordenada se valorarán las potenciales lesiones de sus componentes; en cada caso se sugerirá la técnica de imagen para su evaluación y se describirán e ilustrarán los hallazgos. Conclusión. En la hipoacusia postraumática, la tomografía computarizada es la técnica de elección inicial y permitirá la detección de alteraciones que condicionen hipoacusia conductiva; la resonancia magnética es útil en la valoración de la hipoacusia neurosensorial


Objective. Hearing loss is the most frequent complication of temporal bone trauma. The role of the radiologist is of great importance; the adequacy and selection of the imaging technique, as well as its correct interpretation, are crucial to establish the diagnosis, prognosis and enable the selection of appropriate treatment. With the aim of systematizing the most relevant concepts in the evaluation of image studies in this scenario, this review will be outlined according to the hearing loss type. The potential lesions of its components will be assessed; In each case the most appropriate imaging technique will be suggested and the findings will be described and depicted. Conclusion. In postraumatic hearing loss, computed tomography is the initial technique of choice and will allow the detection of alterations that cause conductive hearing loss; magnetic resonance imaging will be useful in the evaluation of sensorineural hearing loss


Assuntos
Humanos , Osso Temporal/diagnóstico por imagem , Perda Auditiva Neurossensorial/diagnóstico por imagem , Perda Auditiva Condutiva/diagnóstico por imagem , Orelha Interna/diagnóstico por imagem , Osso Temporal/lesões , Imageamento por Ressonância Magnética , Tomografia Computadorizada Multidetectores/métodos , Orelha Externa/diagnóstico por imagem , Orelha Externa/lesões , Orelha Média/diagnóstico por imagem , Orelha Média/lesões , Orelha Interna/lesões
19.
Eur. j. anat ; 22(1): 23-25, ene. 2018. ilus
Artigo em Inglês | IBECS | ID: ibc-170478

RESUMO

As the ossicles are the smallest bones, they are well protected in temporals and pose difficulty in their retrieval. For the retrieval of the ossicles we require a method which does not disturb the normal anatomy of the tympanum along which intact bones can be taken out. Two hundred fifty temporal bones were dissected by Cobbler's cut technique to assess its efficacy and reasonability for the retrieval of the ossicles. This technique quickly exposes the middle ear cavity and helps in easy retrieval of the the ossicles with preservation of the normal anatomy of the tympanic cavity. The complete sets of ossicles were successfully retrieved in about 86-89% of cases; whereas, in only 11-14% cases we could not be able to collect the complete set of ossicles. The Cobbler’s cut technique proves to be a reasonably good method for the retrieval of intact ossicles


No disponible


Assuntos
Humanos , Ossículos da Orelha/anatomia & histologia , Osso Temporal/anatomia & histologia , Orelha Média/anatomia & histologia , Dissecação/instrumentação , Córtex Auditivo/anatomia & histologia
20.
Neurocir.-Soc. Luso-Esp. Neurocir ; 28(5): 247-250, sept.-oct. 2017. ilus
Artigo em Espanhol | IBECS | ID: ibc-167472

RESUMO

La compresión neurovascular de origen arterial se postula como principal mecanismo de producción de la neuralgia primaria del trigémino. A pesar de ser la causa más frecuente, existen otras patologías, como los tumores localizados en el ángulo pontocerebeloso, capaces de producir dolor trigeminal. Presentamos el caso de una paciente de 44años con neuralgia del trigémino derecha sin respuesta al tratamiento médico. La RM cerebral previa no muestra signos de patología estructural. Durante la descompresión microvascular del nervio trigémino se encuentra endostosis de la cara interna del peñasco que provocaba compresión del V par. Tras el fresado completo y la descompresión microvascular desaparece de manera completa el dolor en el postoperatorio inmediato, manteniendo asintomática al año de la cirugía. La endostosis del hueso temporal es una causa muy infrecuente de neuralgia del trigémino. Una adecuada revisión de los estudios preoperatorios permitiría la optimización del manejo quirúrgico definitivo


Arterial neurovascular compression is hypothesised to be the main cause of primary trigeminal neuralgia. Although it is the most common cause, other pathologies, such as tumours in the cerebellopontine angle, can cause trigeminal pain. We report a case of a 44-year-old female patient with right trigeminal neuralgia without satisfactory response to medical treatment. Cerebral MRI showed no structural injuries. During microvascular decompression of the trigeminal nerve, endostosis of the internal aspect of the petrous bone was found to compress the trigeminal nerve. The pain disappeared completely in the early postsurgical period, after the complete drilling of the endostosis and microvascular decompression. The patient remains asymptomatic one year later. Endostosis of the petrous bone is a rare cause of trigeminal neuralgia. A proper review of preoperative studies would enable the definitive surgical approach to be optimised


Assuntos
Humanos , Feminino , Adulto , Neuralgia do Trigêmeo/complicações , Neuralgia do Trigêmeo/diagnóstico por imagem , Neuralgia do Trigêmeo/cirurgia , Síndromes de Compressão Nervosa/complicações , Osso Temporal/diagnóstico por imagem , Osso Temporal/patologia , Síndromes de Compressão Nervosa/cirurgia , Osso Petroso/diagnóstico por imagem , Osso Petroso/patologia
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