Carcinoma escamoso oral: análise retrospectiva de 185 casos

The squamous cell carcinoma is the most common malignancy in the oral cavity, representing over 90% of cancers in this region. This study aimed to conduct an epidemiological study of oral squamous carcinoma cases diagnosed by the Department of Pathology, Department of Pathology and Clinical Propaedeutics in the Dentistry Faculty of Araçatuba - UNESP, in the period between 1995 and 2005. 185 cases were studied, it was observed that the oral floor and tongue were the sites most affected, with predominance in males, white race and aged between 41 and 60 years, noting that the majority of patients were smokers. Knowledge of these data is important for the dental surgeon to act preventively, contributing to early diagnosis of cancer.

Histological and immunohistochemical study of the expression of p53 and ki-67 proteins in the mucosa of the tongue, pharynx and larynx of rats exposed to cigarette smoke

Introduction: Head and neck cancers are linked to smoking. The most affected sites are the oral cavity, pharynx and larynx. Experimental studies show epithelial lesions caused by cigarette smoke. Objectives: To investigate in rats the effects of acute cigarette smoke exposure on the mucosa of the tongue, pharynx and larynx.Material and method: Wistar rats were allocated into two groups of 20 animals: CG (control) receiving food and water ad libitum and TG (Tobacco) exposed to the smoke of 40 cigarettes/day for 60 days. Biopsy of their tongues, pharynxes and larynxes were subjected to histopathological, histomorphometric and immunohistochemical studies of protein p53 and ki-67.Result: The histological analysis of tongue from the Tobacco group revealed epithelial hyperplasia (90%), basal cell hyperplasia (95%) and mild to moderate dysplasia (85%). In pharynx showed basal cell hyperplasia (85%), dysplasia (25%) and vascular congestion (95%). In larynx showed basal cell hyperplasia (70%), epithelial hyperplasia (55%), congestion (100%) and inflammatory infiltrate (25%). Morphometric analysis revealed that keratin layer thickness was greater in the tobacco group. P53 immunoexpression was negative in both groups. Ki-67 immunoexpression was positive in basal cell nuclei but in parabasal cell nuclei it was positive only in the Tobacco group.Conclusions: The exposure of animals to cigarette smoke for 60 days resulted in benign lesions. The duration of exposure was not enough to cause the development cancer, as confirmed by the negative expression of p53 protein in all slides examined. Analysis of ki-67 expression showed intense epithelial proliferation in response to damage.

Analysis of depth of the microporosity in a nickel-chromium system alloy: effects of electrolytic, chemical and sandblasting etching

The present study was designed to analyse the average depth of the microporosity of a nickel-chromium (Ni-Cr) system alloy (Verabond II). The metal surface was subject to one of the following surface treatment: (i) Electrolytic etching in nitric acid 0.5 N at a current density of 250 mA cm(-2) ; (ii) chemical etching with CG-Etch etchant; and (iii) Sandblasting with alumina particles 50 mum. Half of the samples were polished before the surface treatments. The depth of porosity was measured through photomicrographs (500x) with a profilometer, and the data were statistically analysed using an analysis of variance (anova) followed by Tukey's test. The conclusions were (i) Differents surface treatment of the Ni-Cr system alloy lead to different depths of microporosity; (ii) the greatest depth of porosity was observed in non-polished alloy; (iii) the greatest and identical depth of microporosity was observed following electrolytic etching and chemical etching; (iv) the least and identical depth of microporosity was observed with chemical etching and sandblasting with alumina particles 50 mum, and (v) Chemical etching showed an intermediary depth.

Alcohol dehydrogenase 3 genotype as a risk factor for upper aerodigestive tract cancers

Objective: To assess alcohol dehydrogenase 3 (ADH3) polymorphism at position Ile349Val as indicator of risk factor for upper aerodigestive tract (UADT) cancer to verify its association with UADT cancer in nonalcoholic or nonsmoking individuals.Design: Cross-sectional study.Setting: Primary care or referral center.Patients: the study group consisted of 141 consecutive patients with newly diagnosed squamous cell carcinoma of the oral cavity, oropharynx, hypopharynx, or larynx admitted for surgical treatment. The comparison group consisted of 94 inpatients without cancer from the A. C. Camargo or other São Paulo (Brazil) hospital and 40 healthy individuals.Intervention: All participants were interviewed and data were collected using a structured questionnaire. After written informed consent was obtained, 20 mL of blood was collected in heparinized tubes.Main Outcome Measures: Odds ratio for ADH3 genotypes using logistic regression models.Results: After adjustment for sex, age, tobacco use, and history of cancer in first-degree family relatives, a significantly higher odds ratio for UADT cancer was observed among individuals with AA genotype and low cumulative alcohol consumption (:5 100 kg of ethanol) (odds ratio=3.8 [95% confidence interval, 1.5-9.7]). A 4-fold increase in odds ratio for UADT cancer among individuals with AA genotype and low tobacco consumption (:525 pack-years) was also found in the adjusted model.Conclusions: These results suggest that genotype AA may be a risk factor for UADT cancer, especially in individuals with low alcohol or tobacco consumption. However, further epidemiological case-control or cohort studies, preferably prospective, are needed to establish the exact role of ADH3 polymorphism and its association with the development of UADT cancers.

Presence of Staphylococcus spp. and Candida spp. in the human oral cavity

A presença de leveduras do gênero Candida e Staphylococcus na cavidade bucal humana é de extrema importância, pois podem atuar como microbiota suplementar e em determinadas situações causar doença bucal ou sistêmica. O objetivo do presente trabalho foi estudar a prevalência de Candida spp. e Staphylococcus spp. na cavidade bucal humana. Enxagüe bucal foi coletado de 68 indivíduos segundo a técnica proposta por Samaranayake e MacFarlane e a seguir semeados em ágar Sabouraud dextrose com cloranfenicol e ágar Baird-Parker. Após crescimento, os microrganismos foram isolados e identificados através de provas bioquímicas. Os dados foram analisados através de análise de variância (ANOVA). Leveduras do gênero Candida foram encontradas em 61,76% dos indivíduos examinados, sendo C. albicans a mais frequentemente isolada. Staphylococcus spp. foram isolados em 95,60% das cavidades bucais, sendo 41 cepas (63%) coagulase-negativas. Das cepas coagulase-positivas, nove eram S. aureus, 11 S. hyicus, e quatro S. schleiferi subespécie coagulans. Não foi observada correlação entre as contagens (UFC) de Candida spp. e Staphylococcus spp. encontradas nos enxagües bucais dos indivíduos examinados.

Endovascular treatment of pseudoaneurysm of the thoracic aorta from a firearm injury

A 24-year-old male patient was the victim of a firearm wound that penetrated the thorax. He arrived at another hospital hemodynamically unstable and was submitted to exploratory surgery by means of bithoracotomy. A lesion of the left branch of the pulmonary artery was detected and successfully repaired. He was submitted for computer-aided tomography on the fifth postoperative day, and a lesion of the mid-thoracic aorta was detected, which formed a saccular image. Considering that the patient had already been submitted to a bithoracotomy and that a direct approach to repair would involve another thoracotomy within a short period of time, endovascular treatment was chosen in our hospital. The procedure was performed under fluoroscopy. A second computer-aided tomography indicated adequate treatment of the lesion, with no indication of an endoleak. He has undergone ambulatory follow-up for 36 months without any problem related to the procedure. While endovascular treatment of the aorta has developed enormously, multicenter studies are needed to better define the long-term results of this approach. © 2008 Published by European Association for Cardio-Thoracic Surgery. All rights reserved.

Myositis ossificans traumatica of the medial pterygoid muscle: a case report.

In this report, we present a case of myositis ossificans traumatica (MOT) of the medial pterygoid muscle that had developed after mandibular block anesthesia administered for endodontic treatment of the lower right second molar, demonstrating typical features of this condition. MOT should be considered as a differential diagnosis when there is severe limitation of jaw opening and an associated trauma. Panoramic radiographs and axial and coronal computed tomography (CT) scans can effectively delineate the calcified mass. Other imaging studies that may be helpful include magnetic resonance imaging (MRI), bone scans, and ultrasound. As shown in our case, calcified masses were found in the right mandibular angle, which severely limited jaw opening. Some earlier reported cases of MOT were treated by extraoral surgical approaches with complete removal of the evolving muscle. The aim of this case report is to present only the diagnostic imaging aspects of myositis ossificans traumatica.

Consensus for the diagnosis, prognosis and treatment of canine mammary tumors

The purpose of this paper is to establish criteria that could guide the diagnosis, prognosis and treatment of canine mammary neoplasias. It was elaborated during the Mammary Pathology Meeting: Diagnosis, Prognosis and Treatment of the Canine Mammary Neoplasm, held on November 6 th and 7 th, 2010 in Belo Horizonte - MG, Brazil, sponsored by the Laboratory of Comparative Pathology - UFMG, with the support of the Brazilian Association of Veterinary Pathology (ABPV) and Brazilian Association of Veterinary Oncology (ABROVET). Academics from several regions of Brazil were present and contributed to this work.

Expressão de mastócitos em quelite actínica e carcinoma epidermóide de lábio inferior

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Avaliação da expressão das proteínas p53, MDM2 e SUMO-1 em líquen plano bucal, displasia epitelial bucal e carcinoma de células escamosas bucal

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

O papel da proteina p53 e do gene TP53 na carcinogênese bucal quimicamente induzida pela 4NQO em ratos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

TWIST1 Is a Molecular Marker for a Poor Prognosis in Oral Cancer and Represents a Potential Therapeutic Target

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Análise da expressão gênica em resposta ao tratamento com Euphorbia tirucalli (Aveloz) em carcinoma epidermóide de laringe

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Validation of the Geriatric Oral Health Assessment Index in complete denture wearers

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Penectomia em equino com carcinoma de células escamosas

The presence of increased volume in penis and prepuce of horses can be of neoplastic or non-neoplastic origin. Squamous cell carcinoma (SCC), papilloma, fibropapiloma, melanoma and sarcoidorigin. Squamous cell carcinoma (SCC), papilloma, fibropapilloma, melanoma and sarcoid are detached as neoplastic causes. The non-neoplastic causes can be parasitic as habronemiasis and pythiosis, or inflammation, resulting in the formation of exuberant granulation tissue. The penile disorders can be easily confused with each other because they have similar clinical signs. Among epithelial neoplasms affecting penis and prepuce, squamous cell carcinoma is the most common in horses. Thus, it was aimed to report a case of squamous cell carcinoma in a horse and describe the main differential diagnosis for this disease. The additional tests to obtain an accurate diagnosis and the institution of appropriate treatment are essential for the satisfactory repair of penile neoplasms in this species.