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Search Results: 1 - 10 of 60333 matches for " Antonio Santos;Altemani "
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Management of salivary gland adenoid cystic carcinoma: institutional experience of a case series
Tincani, Alfio José;Del Negro, André;Araújo, Priscila Pereira Costa;Akashi, Hugo Kenzo;Martins, Antonio Santos;Altemani, Albina Milani;Barreto, Gilson;
Sao Paulo Medical Journal , 2006, DOI: 10.1590/S1516-31802006000100006
Abstract: context and objective: salivary gland tumor management requires long-term follow-up because of tumor indolence and possible late recurrence and distant metastasis. adenoid cystic carcinoma (acc) accounts for 10-15% of such tumors. the aim here was to evaluate surgical and clinical management, staging and follow-up of acc patients in one academic institution. design and setting: retrospective study at head and neck service, universidade estadual de campinas. methods: data on 21 patients treated between 1993 and 2003 were reviewed. management utilized clinical staging, histology and imaging. major salivary gland tumor extent was routinely assessed by preoperative ultrasonography. diagnosis, surgery type, margin type (negative/positive), postoperative radiotherapy and recurrence (presence/absence) were evaluated. results: there were eleven major salivary gland tumors (52.3%), seven submandibular and four parotid. ten patients (47.7%) had minor salivary gland acc (all in palate), while the submandibular was the most frequently affected major one. diagnoses were mostly via fine-needle aspiration (fna) and incision biopsy. frozen sections were used for six patients. there was good ultrasound/fna correlation. sixteen (76%) had postoperative radiotherapy. one (4.7%) died from acc and five now have recurrent disease: three (14.2%) locoregional and two (9.5%) distant metastases. conclusion: adenoid cystic carcinoma has locally aggressive behavior. in 21 cases, of acc, the facial nerve was preserved in all except in the few with gross tumor involvement. treatment was defined from physical examination, imaging, staging and histology.
Parapharyngeal space tumors: considerations in 26 cases
Tincani, Alfio José;Martins, Antonio Santos;Altemani, Albina;Scanavini Jr., Rui Carlos;Barreto, Gilson;Lage, Henriette de Toledo;Valério, Jo?o Batista;Molina, Giulianno;
Sao Paulo Medical Journal , 1999, DOI: 10.1590/S1516-31801999000100006
Abstract: context: parapharyngeal space tumors comprise less than 0.5% of all head and neck neoplasms.1 the majority of these tumors are benign, but surgery is usually required to establish the diagnosis and treat the patients. we present 26 patients treated surgically for tumors arising in the parapharyngeal space (pps) at the state university of campinas hospital ? unicamp. cases serie: of these, 17 (65.5%) had benign and 9 (34.6%) malignant neoplasms. the surgical and pathological data relevant to these cases are highlighted, observing any local recurrence, surgical complications and the five-year survival. neurogenic tumors and soft tissue sarcomas were, respectively, the most frequent benign (35.3%) and malignant neoplasms (44.5%). benign tumors accounted for the majority of the cases and involved minimal surgical morbidity with no recurrence during a median follow-up of five years. malignant tumors had a high rate of recurrence and mortality. surgery is the treatment of choice for pps tumors. a knowledge of the anatomy of this site is essential for the safe performance of surgical procedures. malignant neoplasms have a poor prognosis. fine needle aspiration was helpful in diagnosis of all tumors.
Laryngeal adenoid cystic carcinoma: case report
Del Negro, André;Ichihara, Edson;Tincani, Alfio José;Altemani, Albina;Martins, Ant?nio Santos;
Sao Paulo Medical Journal , 2007, DOI: 10.1590/S1516-31802007000500010
Abstract: context: adenoid cystic carcinomas are malignant tumors that occur in both the major and the minor salivary glands. a laryngeal location is rare because of the paucity of accessory salivary glands in this area. adenoid cystic carcinomas account for less than 1% of all malignant tumors in the larynx, and only about 120 cases have been reported in the literature. these tumors have a slight female predisposition, and their peak incidence is in the fifth and sixth decades of life. in this article, we describe a case of laryngeal adenoid cystic carcinoma and discuss its clinical characteristics and treatment. case report: we report on a case of laryngeal adenoid cystic carcinoma in a 55 year-old female patient who presented with dyspnea and hoarseness. features of the diagnostic and therapeutic evaluation are described and the clinical management of such cases is outlined. the clinical course, definitive treatment strategy and surgical procedure, and also adjuvant treatment with irradiation are discussed. although the tumor is radiosensitive, it is not radiocurable.
A importancia da endoscopia digestiva alta com solu??o de lugol no diagnóstico de cancer superficial e displasia em es?fago de doentes com neoplasias de cabe?a e pesco?o
TINCANI, Alfio José;BRANDALISE, Nelson;ANDREOLLO, Nelson Adami;LOPES, Luiz Roberto;MONTES, Ciro Garcia;ALTEMANI, Albina;MARTINS, Antonio S.;
Arquivos de Gastroenterologia , 2000, DOI: 10.1590/S0004-28032000000200007
Abstract: head and neck cancer has a high incidence in brazil, with cancer of the oral cavity being one of the five most common cancers among brazilians. alcohol and tobacco consumption may contribute to synchronous or metachronous head and neck cancer and esophageal cancer. a prospective study involving 60 patients with head and neck cancer was carried out at the state university of campinas -unicamp, campinas, sp, brazil to screen for superficial esophageal cancer and dysplasia using endoscopy and a 2% lugol dye solution followed by biopsy of the suspicious areas. five patients (8.3%) had superficial esophageal cancer, which was diagnosed as intraepithelial carcinoma in three of them (5.0%). in four patients, the superficial esophageal cancer was synchronous and in one it was metachronous to head and neck cancer. five patients (8.3%) had dysplasias in the esophageal epithelium (three were classified as mild and two as moderate). these results demonstrate the value of endoscopic screening of the esophagus using lugol dye in patients with head and neck cancer, particularly since superficial esophageal cancer is extremely difficult to detect by conventional methods in asymptomatic patients.
Designing and Researching Virtual Learning Communities
Antonio Santos
International Journal of Emerging Technologies in Learning (iJET) , 2012, DOI: 10.3991/ijet.v7i4.2311
Abstract: This article describes, with a basis in educational literature, some of the main characteristics of learning communities. In addition, a list of instructional strategies is proposed to create a virtual learning community within a traditional academic course. These strategies are then integrated into a proposed research design to study and evaluate this particular type of learning and know what questions to ask, what data to collect, and how to analyze them.
Brasil e China: uma nova alian?a n?o escrita?
Oliveira, Henrique Altemani de;
Revista Brasileira de Política Internacional , 2010, DOI: 10.1590/S0034-73292010000200005
Abstract: considering the extraordinary economic growth experienced by china in recent years, especially after its entry into the world trade organization, this essay on the sino-brazilian relationship will, while analyzing the historical process in its different dimensions, attempt to determine, on one hand, whether current relations may still be understood from the perspective of south-south cooperation, and, on the other, whether the chinese economic boom may be defining a new, much more competitive than cooperative relationship.
Brasil-China: trinta anos de uma parceria estratégica
Oliveira, Henrique Altemani de;
Revista Brasileira de Política Internacional , 2004, DOI: 10.1590/S0034-73292004000100002
Abstract: the present article analyses the brazilian approach to the asian countries, specially, to china, in a historical perspective. at the end of the 19th century and beginning of the 20th, the relationship with that continent was sparse and restricted basically to the coming of japanese workers and to the non-official migration of chinese. during the cold war, under the brazilian attempt to diversify its partnerships, there was a political approach to china on the multilateral sphere, nevertheless the economic ties stayed with japan. despite the traditional discourse of the brazilian diplomacy about the universalization of the country's international relations, just at the 1990's there was in fact a strengthening of the economic approach to china and not only political. the main reasons were the chinese high economic growth and the trade battle that was raised by the proposal for the creation of a free trade area of the americas (ftaa), which is understood as an obstacle to the insertion of external actors.
Os blocos asiáticos e o relacionamento Brasil-ásia
OLIVEIRA, HENRIQUE ALTEMANI DE;
S?o Paulo em Perspectiva , 2002, DOI: 10.1590/S0102-88392002000100012
Abstract: until recently, the only asian country with which brazil had any significant relations was japan. only in the 1990′s was this scope widened to include south korea, southeast asia and china. up until now, the relationship between brazil and the asian blocks has been limited to mercosul′s overtures to asean. this relationship is currently gaining in political intensity through the institutionalization of the relationship between asia and latin america, through focalal.
The AdS5 × S5 Fermionic Model  [PDF]
Elcio Abdalla, Antonio Lima-Santos
Journal of Modern Physics (JMP) , 2014, DOI: 10.4236/jmp.2014.56059
Abstract:

We consider the AdS5 × S5 integrable model. As it turns out, relying on well known arguments, we claim that the conformally invariant fermionic model is solvable, the resulting solution given in terms of two current algebras realizations.

Finite Elements Based on Deslauriers-Dubuc Wavelets for Wave Propagation Problems  [PDF]
Rodrigo Bird Burgos, Marco Antonio Cetale Santos
Applied Mathematics (AM) , 2016, DOI: 10.4236/am.2016.714128
Abstract: This paper presents the formulation of finite elements based on Deslauriers-Dubuc interpolating scaling functions, also known as Interpolets, for their use in wave propagation modeling. Unlike other wavelet families like Daubechies, Interpolets possess rational filter coefficients, are smooth, symmetric and therefore more suitable for use in numerical methods. Expressions for stiffness and mass matrices are developed based on connection coefficients, which are inner products of basis functions and their derivatives. An example in 1-D was formulated using Central Difference and Newmark schemes for time differentiation. Encouraging results were obtained even for large time steps. Results obtained in 2-D are compared with the standard Finite Difference Method for validation.
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