192 research outputs found

    Hyalinizing Granuloma: An Unusual Case of a Pulmonary Mass

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    We describe the case of pulmonary hyalinizing granuloma in a 34-year-old asymptomatic man who presented with a pulmonary nodule apparent by chest radiography and computed tomography (CT). He had a history of previous treatment for tuberculosis. His laboratory data were normal. Bronchoscopy and CT-guided percutaneous transthoracic fine needle aspiration cytology were inconclusive. The diagnosis was revealed after the histopathological examination of an open lung biopsy

    Sclerosing Variant of the Bronchioloalveolar Carcinoma: Imaging Findings in an Atypical Case

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    Bronchioloalveolar carcinoma remains one of the most enigmatic lung cancers, demonstrating varied growth patterns, mixed histological features, and confusing clinical manifestations. This paper reports a case of an unusual form of presentation: a sclerosing type associated with desmoplastic reaction and cicatrization. A 75-year-old woman was admitted with persistent dry cough and progressive dyspnea. Physical examination showed bilateral inspiratory crackles. A chest radiograph and high-resolution computed tomography demonstrated confluent airspace nodules, forming areas of consolidation in both lungs, with signs of architectural distortion. The lung biopsy revealed a nonmucinous sclerosing bronchioloalveolar carcinoma

    DESEMPENHO AGRONÔMICO DO MILHO EM FUNÇÃO DO ESPAÇAMENTO ENTRELINHAS E ESTANDE DE PLANTAS

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    A semeadura é uma das etapas que exigem maior perfeição em sua execução, pois pode comprometer a rentabilidade da atividade agrícola, aliada à escolha do arranjo de plantas para otimizar a produtividade de grãos. O trabalho teve como objetivo avaliar a influência do espaçamento entrelinhas e estande de plantas sobre o desempenho agronômico na cultura do milho. Foi utilizado um delineamento inteiramente casualizado em esquema fatorial 2x3, sendo dois espaçamentos entrelinhas (42,5 e 85,0 cm) e três densidades populacionais (50000, 55000 e 60000 plantas ha-1), com 6 repetições. Avaliou-se: número médio de dias para a emergência, profundidade de semeadura, distribuição longitudinal, altura de plantas e de inserção da 1ª espiga, diâmetro do colmo, comprimento e diâmetro da espiga, massa e diâmetro do sabugo, número de grãos por fileira e de fileiras por espiga, massa da espiga e de grãos por espiga, massa de mil grãos e produtividade. Com o aumento da população, houve redução do número de dias para emergência, comprimento da espiga, massa da espiga e de grãos da espiga, e massa do sabugo. Com a redução do espaçamento obteve-se maiores porcentagens de espaçamento normal, maior diâmetro da espiga e do sabugo

    Pulmonary Alveolar Microlithiasis: A Case Report with Emphasis on Imaging Findings

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    Pulmonary alveolar microlithiasis (PAM) is a rare disease characterized by the presence of small calculi in the alveolar space. The authors report a case of a 21-year-old man with a 2-year history of shortness of breath on exertion and dry cough. Physical examination was altered only for crackles at auscultation. Pulmonary function revealed a mild restrictive ventilatory defect and the chest radiograph demonstrated paracardiac confluence of dense micronodular infiltrate. High-resolution CT scan revealed diffuse ground glass attenuation and septal thickening, more pronounced in lower pulmonary regions, with calcifications along the interlobar septa and subpleural regions. A transbronchial lung biopsy confirmed the diagnosis of PAM

    Cavitated Conglomerate Mass in Silicosis Indicating Associated Tuberculosis

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    Silicosis is the most common occupational lung disease worldwide. It leads to respiratory impairment and may have associated infections that decrease pulmonary function. We describe the case of a 55-year-old man with chronic silicosis who presented with hemoptysis and a cavitated conglomerate mass. The final diagnosis was silicotuberculosis

    Spontaneous Pneumothorax as an Atypical Presentation of Pulmonary Paracoccidioidomycosis: A Case Report with Emphasis on the Imaging Findings

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    We describe the case of a 45-year-old male with pulmonary paracoccidioidomycosis and spontaneous pneumothorax. The patient presented to the hospital with sudden and intense chest pain accompanied by dyspnea and had a six-month history of dry cough, weight loss, and progressive dyspnea on exertion. Chest X-ray showed a small right pneumothorax, bilateral nonhomogeneous opacities, and emphysematous areas in the lung base. Chest computed tomography showed consolidation in both lungs, with architectural distortion, nodules, interlobular septal thickening, and emphysema, in addition to the right pneumothorax. A lung biopsy revealed yeast consistent with Paracoccidioides brasiliensis. No drainage was needed, and the lung was re-expanded. The patient was treated with antifungal drugs, showed mild improvement, and was referred to outpatient care

    Variabilidade espacial e qualidade na semeadura de soja / Spatial variability and quality in soybean sowing

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    Em culturas propagadas por sementes, a qualidade da semeadura é indispensável para que seja alcançada altas produtividades, sendo que a variabilidade de espaçamentos entre plantas é uma das causas de redução na produtividade. O objetivo deste trabalho foi avaliar a variabilidade espacial e a qualidade na semeadura de soja. Foi utilizado uma malha amostral com 100 pontos espaçados em 50 m, no qual determinou-se o estande de plantas e a uniformidade de espaçamento entre plântulas, confeccionando mapas de variabilidade e cartas de controle. O estande de plantas, assim como os níveis de espaçamentos normais falhos e duplos ficaram fora dos limites agronômicos de controle. O fator operacional de semeadura foi determinante para a irregularidade na distribuição de plantas. Grande parte da área apresentou baixos níveis de espaçamentos normais, sendo que em sua maioria entre 45 e 55%, consequentemente altos níveis de espaçamentos falhos e duplos, sendo na maioria entre 30 e 40% e entre 10 e 30%, respectivamente

    Colon Mucinous Adenocarcinoma in Childhood: A Case Report with Emphasis on Image Findings

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    Colorectal cancer is extremely rare in children. We report a case of a 12-year-old boy who presented with a five-month history of weight loss and anorexia, associated with vomiting episodes, dizziness, fatigue, and dyspnea. On physical examination, a palpable abdominal mass was noticed on the right hypochondrium and flank. An imaging study was performed, which showed a solid mass on the right colon. The patient underwent incisional surgical biopsy, and subsequent histopathologic analysis revealed a colon mucinous adenocarcinoma
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