Líquen plano bucal: considerações clínicas e histopatológicas

O líquen plano é uma das doenças dermatológicas mais comuns que acometem a cavidade bucal, com prevalência de 1% a 2% na população geral. Contudo, apesar de relativamente freqüente, o líquen plano bucal é alvo de muita controvérsia, especialmente em relação ao seu potencial de malignização. OBJETIVO: O presente trabalho tem como objetivo tecer considerações clínicas e histopatológicas a respeito do líquen plano bucal, favorecendo seu entendimento por parte dos profissionais da saúde e, conseqüentemente, reforçando a importância do acompanhamento a longo prazo dos pacientes acometidos pela doença. CONCLUSÃO: A possibilidade da lesão sofrer transformação maligna justifica a importância do acompanhamento a longo prazo dos pacientes com a doença.

O efeito das orelhas externa e média nas emissões otoacústicas

Características como a freqüência de ressonância da orelha externa e da orelha média podem interferir na captação das emissões otoacústicas. OBJETIVO: Investigar a influência da freqüência de ressonância da orelha externa e da orelha média na resposta das emissões otoacústicas. DESENHO CIENTÍFICO: Estudo de série, prospectivo, clínico. MATERIAL E MÉTODO: Foram feitas medidas com microfone-sonda na orelha externa, timpanometria de multifreqüência e teste de emissões otoacústicas por transitório e produto de distorção em 19 orelhas direitas e 20 orelhas esquerdas de indivíduos do sexo masculino e 23 orelhas direitas e 23 orelhas esquerdas de indivíduos do sexo feminino com 17 a 30 anos. As 85 orelhas eram audiologicamente normais. RESULTADOS: Não foram observadas relações estatisticamente significantes entre a melhor freqüência de emissões otoacústicas e a freqüência de ressonância da orelha externa oclusa e da orelha média. CONCLUSÃO: Os níveis de respostas das emissões otoacústicas por transitório e produto de distorção não são influenciadas apenas pela ressonância da orelha externa e da orelha média.

Study on suppression of otoacoustic emissions: lateral domain

A pon stimulation by contralateral, ipsilateral or bilateral noise, the medial olivocochlear efferent tract changes the amplitude of otoacoustic emissions relative to the tested ear, reducing or removing it; this resulted in a reduction/suppression effect of otoacoustic emissions. Differences in patterns of elimination/reduction of otoacoustic emissions between ears have been documented worldwide; there are, however, no Brazilian studies investigating the effect of lateral dominance.Aims: To compare the effect of the presence of deletion/reduction of otoacoustic emissions and their amplitude relative to lateral dominance in normal hearing adults.Methods: A clinical and experimental study. The sample comprised 75 individuals. The methodology was conventional - linear click intensity of 60 dB SPL; white noise was contralateral stimulation at 60 dB SPL.Description of results: There were no statistically significant differences between right and left ear results, in terms of asymmetry of the degree of otoacoustic emissions and the presence of suppression/reduction.Conclusion: There is no lateral dominance in the degree of otoacoustic emissions in the presence of suppression/reduction in the study population.

Analysis of the TAX1BP1 gene in head and neck cancer patients

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Panorama atual da ética em pesquisa em seres humanos

In the last decades, medical care has been increasingly permeated by the concept of evidence-based-medicine, in which clinical research plays a crucial role in establishing diagnostic and treatment. Following the improvements in clinical research, we have a growing concern and understanding that some ethical issues must be respected when the subjects are human beings. Research with human subjects relies on the principles of autonomy, beneficence, no maleficence and justice. Ordinance 196/96 from the National Health Board adds to the Brazilian legislation such renowned bioethical principles.Aim: Discuss the main ethical aspects involved in research with human subjects.Materials and Methods: Critical analysis of Ordinance 196/96 and related literature.Conclusion: Ordinance 196/96 rules research with human subjects; nevertheless, it requires more in-depth discussions regarding the informed consent, use of placebo, research with vulnerable populations and research in developing countries.

AFASIA MOTORA, PARALISIA FACIAL E HEMIPLEGIA DIREITA APOS ABSCESSO DENTARIO A ESQUERDA

The authors report a case of a 6 year old child who presented with dental abscess associated with a parietal and frontal cerebrite, right facial paralysis and motor aphasia. The clinical findings, radiological examination including computerized tomography and type of treatment are presented. At beginning, the patient did not respond to antimicrobial therapy and only after drainage of her dental abscess revealed good clinical evolution.

ASPECTOS ETIOLOGICOS DA HIPERNASALIDADE CONSEQUENTE A PARALISIA DE PALATO MOLE - RELATO DE 6 CASOS

The authors studied the main aspects of etiology of the palate paralysis in six children suffering from soft palate paralysis. They emphasized the importance of multidisciplinary approach in the management of patients with this disease. In the author's cases the most likely etiologies were: neuropathy post-viral epidemic parotitis, tumors localized in the posterior cerebral fossa and idiopathic. They concluded that it is extremely important in these patients a detailed otorhinolaryngologic, neurologic and fonoaudiologic examinations.

ALGIAS CRANIOFACIAIS - UM ROTEIRO PARA O EXAME FISICO DIRIGIDO

Craniofacial pain is a frequent challenge for the physician anamnesis with the goal to obtain specific and useful information about symptoms in craniofacial pain. It can be improved by identifying aching points. In the article, the authors present a practical and specific schedule for physical examination to be applied in patients with chronic pain. This specific schedule, which has proved useful in detecting the exact anatomic sites of pain, has a sequence ordered which includes palpation and inspection of muscles, nerves and arteries.

NEUROFIBROMATOSE DE LINGUA - RELATO DE CASO

Neurofibromatosis may involve any part of the body, including cervical-facial region and intra-oral structures. The authors present a case of neurofibromatosis involving the tongue. They emphasize the need of close follow up of the patients as those lesions often show a high rate of recurrence.