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J Surg Oncol ; 126(7): 1199-1204, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-35960603


BACKGROUND: Small bowel carcinoid (SBC) primary tumors can be multifocal in 40%-55% of patients and challenging to detect. Near infrared autofluorescence (NIRAF) is used for detection of parathyroid glands. It is unknown if this technology can be used to identify SBCs and how it would compare with current imaging modalities. METHODS: This was a prospective institutional review board-approved pilot study of three patients undergoing resection of SBCs. NIRAF was used to image SBCs and mesenteric lymph nodes intraoperatively and at back table. Findings were compared with preoperative imaging, surgical exploration and pathology. Statistics were performed using Mann-Whitney U test. RESULTS: Eleven SBCs and 12 mesenteric lymph nodes were analyzed. All SBCs had a brighter focal autofluorescence (AF) signal compared to background. Normalized pixel intensity of SBCs was 2.2 (0.7) and normal small bowel 1.4 (0.6) (p < 0.0001). NIRAF was less accurate in detecting occult lymph node metastasis, but was superior to DOTATATE PET for detecting SBCs in two of three patients. CONCLUSIONS: This preliminary report suggests that SBCs exhibit distinctly bright AF signals on NIRAF to create a contrast distinction from normal small bowel. This technology may have a utility as an adjunctive tool for intraoperative detection of occult SBCs.

Tumor Carcinoide , Imagem Óptica , Humanos , Projetos Piloto , Estudos Prospectivos , Imagem Óptica/métodos , Glândulas Paratireoides/cirurgia , Tumor Carcinoide/diagnóstico por imagem , Tumor Carcinoide/cirurgia , Radioisótopos de Gálio , Compostos Radiofarmacêuticos , Tomografia por Emissão de Pósitrons
J Gastrointest Surg ; 22(4): 722-730, 2018 04.
Artigo em Inglês | MEDLINE | ID: mdl-29235002


BACKGROUND: The precise localization of the primary tumor and/or the identification of multiple primary tumors improves the preoperative work-up in patients with small bowel (SB) neuroendocrine tumor (NET). The present study assesses the diagnostic value of 18F-fluorodihydroxyphenylalanine (18F-FDOPA) positron emission tomography/computed tomography (PET/CT) during the preoperative wok-up of SB NETs. METHODS: Between January 2010 and June 2017, all consecutive patients with SB NETs undergoing preoperative 18F-FDOPA PET/CT and successive resection were analyzed. Preoperative work-up included computed tomography (CT), somatostatin receptor scintigraphy (SRS), and 18F-FDOPA PET/CT. Sensitivity and accuracy ratio for primary and multiple tumor detection were compared with data from surgery and pathology. RESULTS: There were 17 consecutive patients with SB NETs undergoing surgery. Nine patients (53%) had multiple tumors, 15 (88%) metastatic lymph nodes, 3 (18%) peritoneal carcinomatosis, and 9 patients (53%) liver metastases. A total of 70 SB NETs were found by pathology. Surgery identified the primary in 17/17 (100%) patients and recognized seven of 9 patients (78%) with multiple synchronous SB. Preoperatively, 18F-FDOPA PET/CT displayed a statistically significant higher sensitivity for primary tumor localization (100 vs. 23.5 vs. 29.5%) and multiple tumor detection (78 vs. 22 vs. 11%) over SRS and CT. Compared with pathology, 18F-FDOPA PET/CT displayed the highest accuracy ratio for number of tumor detected over CT and SRS (2.0 ± 2.2 vs. 0.4 ± 0.7 vs. 0.6 ± 1.5, p = 0.0003). CONCLUSION: 18F-FDOPA PET/CT significantly increased the sensitivity and accuracy for primary and multiple SB NET identification. 18F-FDOPA PET/CT should be included systematically in the preoperative work-up of SB NET.

Di-Hidroxifenilalanina/análogos & derivados , Neoplasias Intestinais/diagnóstico por imagem , Neoplasias Hepáticas/diagnóstico por imagem , Neoplasias Primárias Múltiplas/diagnóstico por imagem , Tumores Neuroendócrinos/diagnóstico por imagem , Neoplasias Peritoneais/diagnóstico por imagem , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada , Compostos Radiofarmacêuticos , Idoso , Idoso de 80 Anos ou mais , Feminino , Radioisótopos de Flúor , Humanos , Neoplasias Intestinais/patologia , Neoplasias Intestinais/cirurgia , Intestino Delgado , Neoplasias Hepáticas/secundário , Metástase Linfática , Masculino , Pessoa de Meia-Idade , Neoplasias Primárias Múltiplas/patologia , Neoplasias Primárias Múltiplas/cirurgia , Tumores Neuroendócrinos/secundário , Tumores Neuroendócrinos/cirurgia , Neoplasias Peritoneais/secundário , Receptores de Somatostatina , Sensibilidade e Especificidade
World J Radiol ; 7(9): 220-35, 2015 Sep 28.
Artigo em Inglês | MEDLINE | ID: mdl-26435774


Small-bowel carcinoid tumors are the most common form (42%) of gastrointestinal carcinoids, which by themselves comprise 70% of neuroendocrine tumors. Although primary small bowel neoplasms are overall rare (3%-6% of all gastrointestinal neoplasms), carcinoids still represent the second most common (20%-30%) primary small-bowel malignancy after small bowel adenocarcinoma. Their imaging evaluation is often challenging. State-of-the-art high-resolution multiphasic computed tomography together with advanced postprocessing methods provides an excellent tool for their depiction. The manifold interactive parameter choices however require knowledge of when to use which technique. Here, we discuss the imaging appearance and evaluation of duodenal, jejunal and ileal carcinoid tumors, including the imaging features of the primary tumor, locoregional mesenteric nodal metastases, and distant metastatic disease. A protocol for optimal lesion detection is presented, including the use of computed tomography enterography, volume acquisition, computed tomography angiography and three-dimensional mapping. Imaging findings are illustrated with a series of challenging cases which illustrate the spectrum of possible disease in the small bowel and mesentery, the range of possible appearances in the bowel itself on multiphase data and extraluminal findings such as the desmoplastic reaction in mesentery and hypervascular liver metastases. Typical imaging pitfalls and pearls are illustrated.

World J Gastrointest Surg ; 5(8): 239-44, 2013 Aug 27.
Artigo em Inglês | MEDLINE | ID: mdl-23983905


AIM: To investigate the prognostic significance of the primary site of disease for small bowel carcinoid (SBC) using a population-based analysis. METHODS: The Surveillance, Epidemiology and End Results (SEER) database was queried for histologically confirmed SBC between the years 1988 and 2009. Overall survival (OS) and disease-specific survival (DSS) were analyzed using the Kaplan-Meier method and compared using Log rank testing. Log rank and multivariate Cox regression analyses were used to identify predictors of survival using age, year of diagnosis, race, gender, tumor histology/size/location, tumor-node-metastasis stage, number of lymph nodes (LNs) examined and percent of LNs with metastases. RESULTS: Of the 3763 patients, 51.2% were male with a mean age of 62.13 years. Median follow-up was 50 mo. The 10-year OS and DSS for duodenal primaries were significantly better when compared to jejunal and ileal primaries (P = 0.02 and < 0.0001, respectively). On multivariate Cox regression analysis, after adjusting for multiple factors, primary site location was not a significant predictor of survival (P = 0.752 for OS and P = 0.966 DSS) while age, number of primaries, number of LNs examined, T-stage and M-stage were independent predictors of survival. CONCLUSION: This 21-year, population-based study of SBC challenges the concept that location of the primary lesion alone is a significant predictor of survival.

GED gastroenterol. endosc. dig ; 30(1): 7-12, jan.-mar. 2011. ilus, tab, graf
Artigo em Português | LILACS | ID: lil-639271


Introdução: os tumores neuroendócrinos do jejuno e íleo representam 23-28% de todos os tumores endócrinos gastrointestinais. A taxa de incidência varia de 0,28 a 0,8 por 100.000 habitantes. Objetivos: revisar o tema e a experiência do INCA, culminando com definição de rotina de serviço. Material e Métodos: procedemos ao estudo retrospectivo dos casos de tumores neuroendócrinos de intestino delgado tratados no Serviço de Cirurgia Abdomino-pélvica do Instituto Nacional de Câncer (INCA) no período de 1996 a 2008, além de revisão bibliográfica. Resultados: relatamos os dados dos 7 casos tratados. Conclusão: concluímos serem os fluxogramas da ENETS (European Neuroendrocrine Tumor Society) válidos e expomos o fluxograma de conduta para estes tumores adotados no INCA.

Introduction: neuroendocrine tumors of the jejunum and ileum account for 23-28% of all gastrointestinal endocrine tumors. The incidence rate varies from 0.28 to 0.8 per 100,000 inhabitants. Objective: to review the theme and the experience of INCA cumino with definition of a routine service. Methods: we conducted the retrospective study of cases of neuroendocrine tumors of the small intestine treated at the Department of Surgery abdomino-pelvic National Cancer Institute (INCA) in the period 1996 to 2008, plus bibliographic review. Results: report the data of 7 cases treated. Conclusion: they are the flowcharts of ENETS valid and expose the flowchart of conduct adopted for these tumors in the INCA.

Humanos , Masculino , Feminino , Idoso , Institutos de Câncer , Tumores Neuroendócrinos , Neoplasias do Íleo , Neoplasias Intestinais , Intestino Delgado , Neoplasias do Jejuno , Estudos Retrospectivos