ABSTRACT Solitary fibrous tumor (SFT) is a benign mesenchymal neoplasm originally described in pleura with a rare presentation in the oral cavity. Herein, we report a case of a 28-year-old male patient who presented an asymptomatic slow-growing mass in the anterior part of the tongue. Intraoral examination revealed a well-circumscribed mass covered by normal mucosa with a fibrous consistency. Due to non-specific clinical findings, the initial diagnostic hypotheses include benign submucosal neoplasms such as leiomyoma, neurofibroma, SFT, and others. An excisional biopsy was performed. Microscopically, the tumor was surrounded by a thick fibrous capsule; hypo and hypercellular areas were arranged in a storiform pattern with a stroma formed by collagen and abundant vascularization. Tumor cells showed immunopositivity for CD34 and STAT-6 and no expression of CD99, AML, S-100, and Ki-67. According to these findings, the diagnosis of SFT was established. After 24 months, the patient is asymptomatic and has no evidence of recurrence. Although oral involvement is rare, SFT should be included in the differential diagnosis of oral submucosal lesions.

Abstract While the region of the Middle and Lower Xingu has been a protagonist during many episodes of Brazilian history, it remains unknown to a large cross-section of society. Within this perspective, we have revealed some of the different elements responsible for the production of regional space by joining theoretical exercise with empirical, which signifies combining some of the knowledge that has been produced on the region with the discourse of some of the different agents involved in its transformation. Accordingly, the following processes were adopted as markers: colonization, the opening of the Trans-Amazonian, land conflicts and the construction of the Belo Monte Hydroelectric Power Plant. As part of this collective effort, based on interviews with the central institutions (from the First, Second and Third sectors), and with communities from different locations within the region, this article gathers together arguments that contribute to the debate regarding the accumulated processes in the Brazilian Amazon, and particularly in the Middle and Lower Xingu.

Resumo Protagonista de diversos episódios da história do Brasil, a região do Médio e Baixo Xingu ainda permanece desconhecida pelos mais diversos setores da sociedade. A partir dessa perspectiva, a estratégia utilizada, neste artigo, para revelar alguns dos diferentes elementos responsáveis pela produção do espaço regional foi conjugar o exercício teórico ao empírico, que, no caso, significa aliar parte do conhecimento produzido sobre este território ao discurso de alguns de seus diferentes agentes de transformação. Para isso, adotou-se como marcos os seguintes processos: colonização, abertura da Transamazônica, conflitos por terra e construção da UHE Belo Monte. Como parte desse esforço coletivo, por meio de entrevistas com representantes de instituições centrais (do primeiro, segundo e terceiro setores) e comunitários de diferentes localidades da região, foram reunidos argumentos que colaboraram para o debate sobre a acumulação de processos na Amazônia brasileira e no Médio e Baixo Xingu, de forma particular.