873 resultados para Estroma tumoral
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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The odontogenic keratocyst is called keratocyst odontogenic tumor (TOQ), due to its features compatible with neoplasms, such as its high recurrence rate and mechanism of growth. Although its etiology has unknown, the origin seems to be connected with dental lamina remaining. This entity is generally benign, with slow progression, asymptomatic, and among the odontogenic tumors, its prevalence is high. It affects mainly males, with predilection for the posterior mandible, while in most cases associated with an impacted tooth. Radiographically, this lesion is unilocular. Histological features are stratified epithelial basal cells with hyperchromatic paraqueratinizado. Treatment ranges from conservative to radical interventions. As a result of the controversy as TOQ tumor entity, the present work is a literature review of current findings, emphasizing its intrinsic features to contribute to developments in the study of this new entity.
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Ameloblastomas are benign, invasive locally and highly recurrent. It is an odontogenic tumor, characterized by the proliferation of epithelial ameloblastic in a fibrous stroma. This paper reports a case of mandibular ameloblastoma, in patients 27 years of age without pain with developments around 4 years, with about 20 mm at its greatest extent, sessile base and surface coatings full. The treatment of choice was the surgical conservative
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Introduction: the term paraneoplastic is a clinical, biochemical, hormonal, neurological and/or associated disorder with hematologic malignancies, but not directly related to primary tumor invasion and metastasis. Paraneoplatic syndromes may be the first sign of a malignancy. Review of literature: the syndromes that are most commonly related to dentistry are of lambertt-Eaton, Gardner, Cowden disease, Peutz-Jeghers, Sjögren, multiple endocrine neoplasic, multiple neurofibromatosis of Von Recklinghausen, nevoid basal cell carcinoma, acanthosis nigrans and pemphigus paraneoplastic. Conclusion: early diagnosis of malignant neoplasms favors prognosis and paraneoplastic syndromes assist in diagnosis. It is important that surgeons-dentists know these events in order to diagnose them as soon as possible and refer these patients to specialized treatment.
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Introduction: When planning excisional surgery, alterations in the oral mucosa, particularly in esthetically important areas, represent a challenge. For cases involving an exophytic lesion with a vegetative tumoral aspect, a clinician may prioritize obtaining a definitive diagnosis by histopathologic and histochemical examinations over the preservation of esthetics or maintenance of the involved tooth. Case Presentation: A painless, hard lesion with normal coloration was present in the maxillary left central incisor of a patient for at least 6 years. A biopsy was performed to preserve oral mucosa and a treatment plan was established that included endodontic retreatment and prosthetic restoration. The histopathologic diagnosis was oral focal mucinosis, an uncommon and poorly characterized type of lesion. Conclusion: A conservative biopsy of the lesion facilitated an accurate diagnosis, promoted the patient’s comfort, and achieved satisfactory esthetic results.
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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In order to refine the solution given by the classical logistic equation and extend its range of applications in the study of tumor dynamics, we propose and solve a generalization of this equation, using the so-called Fractional Calculus, i.e., we replace the ordinary derivative of order 1, in one version of the usual equation, by a non-integer derivative of order 0 < α < 1, and recover the classical solution as a particular case. Finally, we analyze the applicability of this model to describe the growth of cancer tumors.
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)