PUBLIO CESAR CAVALCANTE VIANA
Índice h a partir de 2011
8
Projetos de Pesquisa
Unidades Organizacionais
Instituto de Radiologia, Hospital das Clínicas, Faculdade de Medicina
LIM/44 - Laboratório de Ressonância Magnética em Neurorradiologia, Hospital das Clínicas, Faculdade de Medicina
LIM/44 - Laboratório de Ressonância Magnética em Neurorradiologia, Hospital das Clínicas, Faculdade de Medicina
8 resultados
Resultados de Busca
Agora exibindo 1 - 8 de 8
- Safety and feasibility of radiofrequency ablation for treatment of Bosniak IV renal cysts(2016) MENEZES, Marcos Roberto de; VIANA, Publio Cesar Cavalcante; YAMANARI, Tassia Regina; REIS, Leonardo Oliveira; NAHAS, WilliamPurpose: To describe our initial experience with radiofrequency ablation (RFA) of Bosniak IV renal cysts. Materials and Methods: From 2010 to 2014, 154 renal tumor cases were treated with percutaneous thermal ablation, of which 10 cases (6.4%) from nine patients were complex renal cysts and were treated with radiofrequency ablation. Results: All complex cysts were classified as Bosniak IV (four women and five men; mean age: 63.6 yrs, range: 33-83 years). One patient had a single kidney. Lesion size ranged from 1.5 to 4.1cm (mean: 2.5cm) and biopsy was performed on four cysts immediately before the procedure, all of which were malignant (two clear cell and two papillary carcinoma). Mean volume reduction of complex cysts was 25% (range: 10-40%). No patients required retreatment with RFA and no immediate or late complications were observed. The follow-up of Bosniak IV cysts had a median of 27 months (interquartile range [IQR], 23 to 38) and no recurrence or significant loss of renal function were observed. Conclusions: Mid-term follow-up of the cases in our database suggests that image-guided percutaneous RFA can treat Bosniak IV cysts with very low complication rates and satisfactorily maintain renal function.
- Radiofrequency ablation for treatment of hypersplenism: A feasible therapeutic option(2015) MARTINS, Guilherme Lopes P.; BERNARDES, Joao Paulo G.; ROVELLA, Marcello S.; ANDRADE, Raphael G.; VIANA, Publio Cesar C.; HERMAN, Paulo; CERRI, Giovanni Guido; MENEZES, Marcos RobertoWe present a case of a patient with hypersplenism secondary to portal hypertension due to hepato-splenic schistosomiasis, which was accompanied by severe and refractory thrombocytopenia. We performed spleen ablation and measured the total spleen and ablated volumes with contrast-enhanced computed tomography and volumetry. No major complications occurred, thrombocytopenia was resolved, and platelet levels remained stable, which allowed for early treatment of the patient's underlying disease. Previous work has shown that splenic radiofrequency ablation is an attractive alternative treatment for hypersplenism induced by liver cirrhosis. We aimed to contribute to the currently sparse literature evaluating the role of radiofrequency ablation (RFA) in the management of hypersplenism. We conclude that splenic RFA appears to be a viable and promising option for the treatment of hypersplenism.
- Abdominal gastrointestinal imaging findings on computed tomography in patients with COVID-19 and correlation with clinical outcomes(2021) HORVAT, Natally; PINTO, Paulo Victor Alves; ARAUJO-FILHO, Jose De Arimateia Batista; SANTOS, Joao Manoel Miranda Magalhaes; DIAS, Adriano Basso; MIRANDA, Julia Azevedo; OLIVEIRA, Camila Vilela de; BARBOSA, Camila Silva; MORAIS, Thamara Carvalho; ASSUNCAO-JR, Antonildes N.; NOMURA, Cesar Higa; VIANA, Publio Cesar CavalcantePurpose: Pulmonary imaging finding of Coronavirus disease 2019 (COVID-19) has been widely described, but until now few studies have been published about abdominal radiological presentation. The aim of this study was to provide an overview of abdominal imaging findings in patients with COVID-19 in a multicenter study and correlate them with worse clinical outcomes. Materials and methods: This retrospective study included adult COVID-positive patients with abdominal CT performed from 4/1/2020 to 5/1/2020 from two institutions. Demographic, laboratory and clinical data were recorded, including clinical outcomes. Results: Of 81 COVID-positive patients, the average age was 61 years, 42 (52%) women and 45 (55%) had positive abdominopelvic findings. The most common abdominal imaging features were intestinal imaging findings (20/81, 24%), including colorectal (4/81, 5%) and small bowel thickening (10/81, 12%), intestinal distension (15/81, 18%), pneumatosis (1/81, 1%) and intestinal perforation (1/81, 1%). On multivariate analysis, intestinal imaging findings were associated with higher risk of worse outcome (death or invasive mechanical ventilation) (RR = 2.6, p = 0.04) and higher risk of invasive mechanical ventilation alone (RR = 6.2, p = 0.05). Conclusion: Intestinal abnormalities were common findings in COVID-19 patients who underwent abdominal CT and were significantly correlated to worse outcomes in the clinical follow-up.
- Associating Liver Partition and Portal vein ligation for Staged hepatectomy procedure using ischemic bipartition Two case reports(2018) MACHADO, Marcel C. C.; ABE, Emerson S.; DUMARCO, Rodrigo; VIANA, Publio; MACHADO, Marcel Autran C.Rationale: The associating liver partition and portal vein ligation for staged hepatectomy (ALPPS) procedure is a recently introduced treatment strategy for patients with advanced primary or metastatic liver tumors and small future liver remnants. ALPPS procedure using ischemic bipartition of the liver is a modified technique that may reduce complications compared to classical ALPPS. Patient concerns: Two patients with multiple colorectal liver metastasis with extensive involvement of the liver were considered unresectable before treatment because of small future liver remnant (FLR). Diagnoses: Two patients were diagnosed by imaging examination with volumetry of the liver. Interventions: In the first stage, ischemic bipartition of the liver is achieved using radiofrequency ablation. The Glissonian pedicles from Segment 4 are identified and ablated, the FLR is cleared, and the right portal vein is ligated. In the second stage, the typical procedure is performed, and an extended liver resection is performed. Outcomes: The procedure was feasible with acceptable hypertrophy of FLRs. Blood transfusions were unnecessary, and severe postoperative complications were avoided. Lessons: The ALPPS procedure with ischemic bipartition is safe and feasible and can produce results that are the same as those of the classical ALPPS procedure while reducing invasiveness during the first stage.
- Current concepts in multiparametric magnetic resonance imaging for active surveillance of prostate cancer(2018) CAVALCANTE, Alexandre; VIANA, Publio Cesar C.; GUGLIELMETTI, Giuliano B.; PONTES, Jose; NONEMACHER, Henrique; CORDEIRO, Mauricio D.; BEZERRA, Regis Otaviano F.; COELHO, Rafael F.; NAHAS, William Carlos
- Magnetic resonance imaging of the vagina: an overview for radiologists with emphasis on clinical decision making(2015) FERREIRA, Daian Miranda; BEZERRA, Régis Otaviano França; ORTEGA, Cinthia Denise; BLASBALG, Roberto; VIANA, Públio César Cavalcante; MENEZES, Marcos Roberto de; ROCHA, Manoel de SouzaAbstract: Magnetic resonance imaging is a method with high contrast resolution widely used in the assessment of pelvic gynecological diseases. However, the potential of such method to diagnose vaginal lesions is still underestimated, probably due to the scarce literature approaching the theme, the poor familiarity of radiologists with vaginal diseases, some of them relatively rare, and to the many peculiarities involved in the assessment of the vagina. Thus, the authors illustrate the role of magnetic resonance imaging in the evaluation of vaginal diseases and the main relevant findings to be considered in the clinical decision making process.
- Extensive renal sinus lipomatosis in xanthogranulomatous pyelonephritis simulating liposarcoma(2018) ANDO, Sabrina de Mello; MORENO, Raquel Andrade; VIANA, Publio Cesar Cavalcante; YAMAUCHI, Fernando IdeRenal replacement lipomatosis is a condition characterized by varying degrees of renal parenchymal atrophy and perirenal fibrofatty proliferation secondary to chronic inflammation such as xanthogranulomatous pyelonephritis. In severe cases, imaging findings can be misdiagnosed as retroperitoneal liposarcoma.
- Systemic Air Embolism after Percutaneous Lung Biopsy: A Manageable Complication(2017) FIORE, Lucas; FRENK, Nathan Elie; MARTINS, Guilherme Lopes Pinheiro; VIANA, Publio Cesar Cavalcante; MENEZES, Marcos Roberto deCT-guided percutaneous biopsy is a resourceful and widely used tool to evaluate pulmonary nodules that frequently avoids costly and unnecessary surgeries. Severe complications occur in less than 1% of cases and include gas embolism, which is rarely documented. We report a case of gas embolism after transthoracic biopsies and discuss the pathophysiology and the benefits of early diagnosis and proper management.