Abstract library

288 results for "large bore".
#2113 How to Perform Contrast Enhanced Oncologic Staging MRI of Abdomen and Pelvis with a Hepatocyte Specific Agent in a Large Bore MR Scanner: Optimizing Extrahepatic Tumor Evaluation in Neuroendocrine Neoplasms
Introduction: Liver specific MR contrast agents in neuroendocrine neoplasms (NEN) have shown its advantages in evaluation of hepatic tumor burden. However, a standard scan protocol is insufficient in extrahepatic and especially pelvic tumor evaluation.
Conference: 15th Annual ENETS conference (2018)
Category: Imaging and Interventions (radiology, endoscopy)
Presenting Author: Dr. Uli Fehrenbach
#22 A Case Illustrative of Phenotypic Heterogeneity and Challenges in the Management of Paraganglioma
Introduction: Paragangliomas (PGLs) are extra-adrenal, usually benign, highly vascularized tumors that originate from neural-crest-derived chromaffin cells. These tumors are subdivided as either sympathetic or parasympathetic, depending on their location and catecholamine production. Sympathetic PGLs are situated along the abdominal sympathetic trunk and usually produce catecholamines, whereas parasympathetic PGLs are located in the head and neck, and these usually do not produce catecholamines. PGLs may present as sporadic or inherited tumor syndrome, including MEN 2, with RET germline mutations, von Hippel-Lindau (VHL) disease due to germline mutations in VHL gene, and pheochromocytoma-PGL syndrome. The latter is frequently a hereditary condition and is caused by germline mutations in the SDHB, SDHC, or SDHC genes. Patients with familial PGLs may present at a younger age, often as multifocal tumors, with an increased risk of recurrence and a higher frequency of malignancy in those with SDHB mutations. SDH mutations induce angiogenesis and tumorogenesis through the inhibition of hypoxia-inducible factors (HIF)-propyl hyroxylase. A younger age at onset, malignancy, and a positive family history are clinical parameters of high specificity, but low sensitivity for diagnosis. Genetic analysis for mutations in SDH genes for the patient and family members, and surveillance for the affected patient and family members, are necessary where there are no clear clinical or family indicators for the syndrome. We present a case of a large abdominal malignant PGL in a 20-year-old pt. that went on without clinical detection for at least three years.
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: Dr Mohammed Ahmed
#1769 Minimal Risk of Persistent or Recurrent Hypoglycemia after MEN1-Related Insulinoma Surgery. A Large International Cohort Study
Introduction: Current literature states that 15-30% of the MEN1 patients suffer from hypoglycemia after insulinoma surgery.
Conference: 14th Annual ENETS conference (2017)
Category: Surgical treatment
Presenting Author: Drs. Sjoerd Nell
Keywords: MEN1
#939 Large Cell Neuroendocrine Carcinoma of the Gallbladder: A Case Report and Literature Review
Introduction: Primary large cell neuroendocrine carcinoma (LCNEC) of the gallbladder is rare. The standard treatment for gallbladder NEC with liver metastases has not been established, but combination chemotherapy with etoposide plus cisplatin (EP) is recommended for NEC patients with liver metastasis, regardless of the primary tumor site.
Conference: 11th Annual ENETS Conference (2014)
Category: Clinical cases/reports
Presenting Author: MD Shoichi Nakazuru
Authors: Nakazuru S, Kimura K, Tada Y, Iwasaki R, ...
#1765 Management of MEN1 Related Non-Functioning Pancreatic NETs: A Shifting Paradigm. Results from the Dutch MEN1 Study Group
Introduction: The evidence base when to operate MEN1 related non-functioning pancreatic neuroendocrine tumors (NF-pNETs) is meager.
Conference: 14th Annual ENETS conference (2017)
Category: Surgical treatment
Presenting Author: Drs. Sjoerd Nell
Keywords: MEN1
#453 Activation of Hedgehog Pathway in Neuroendocrine Tumor
Introduction: Neuroendocrine tumors (NETs) are rare tumors and often follow an indolent course, especially the tumors of low-to-intermediate grade. The genetic etiology of sporadic NET is largely unknown. It is well-known that a significant number of patients with NETs may have harbored the slow-growing lesions since very a young age, suggesting it could result from alterations of pathways involved in development. Hedgehog (Hh) signaling has been found to be important in embryonic patterning, stem cell maintenance and tissue repair; and is normally silenced in most mature adult tissue. However, it frequently undergoes gain-of-function mutations or reactivation due to ligand overproduction and has been linked to the etiology of a variety of tumors.
Conference: 9th Annual ENETS Conference (2012)
Category: Basic
Presenting Author: MD Mei Dong
#1564 Well Differentiated Pancreatic Neuroendocrine Tumors (WDPNET) G3: Does the Ki67 Really Do It All?
Introduction: WDPNET G3, although not recognized by the 2010 WHO classification are far from exceptional. They also represent a great therapeutic challenge especially since their molecular drivers are unknown.
Conference: 13th Annual ENETS conference (2016)
Category: Basic Science - Genetics, epigenetics, miRNAs
Presenting Author: Dr Jerome Cros
#2123 Large Cell Neuroendocrine Carcinoma (LCNEC) Associated with a Dysplastic Sessile Serrated Lesion (SSL) and Deficient Mismatch Repair (MMR) Protein: A Case Report.
Introduction: Colorectal poorly differentiated neuroendocrine carcinomas (NECs) are rare, but extremely aggressive. The mechanisms of their carcinogenesis and aggressiveness are still largely unknown. Recently Nobuyoshi Takizawa showed that the molecular features of colorectal NECs are similar to those of adenocarcinoma and not to those of NETs and they were more evident in small cell NECs than in large cell NECs. This is supported by combined cases with conventional adenoma/adenocarcinoma and NECs. Stelow et al showed that DNA mismatch repair proteins were intact in 14/15 colorectal small cell NECs. Two cases of LCNECs arising from SSL have been reported so far in the literature.
Conference: 15th Annual ENETS conference (2018)
Category: Case reports
Presenting Author: Dr Tu Vinh Luong
Authors: Luong T V, Nisa Z, ...
#1168 Simultaneous Large Cell Neuroendocrine Carcinoma and Adenocarcinoma of the Stomach: A Case Report and Literature Review
Introduction: Large cell neuroendocrine carcinoma (LCNEC) of the stomach is rare. Gastric NEC occasionally has another component, such as adenocarcinoma, in the same tumor. However, the concurrent occurrence of LCNEC and adenocarcinoma at different sites in the stomach is extremely rare.
Conference: 12th Annual ENETS Conference (2015)
Category: Clinical cases/reports
Presenting Author: MD Shoichi Nakazuru
#69 Frequent biological association of Merkel cell polyomavirus with Merkel cell carcinomas
Introduction: Merkel cell polyomavirus (MCPyV) DNA has been detected by PCR in 75–100% of Merkel cell carcinomas (MCC), an aggressive neuroendocrine skin cancer. MCPyV is a 5.4 kb DNA virus that expresses tumor (T) antigen in tumor tissues.
Conference: 7th Annual ENETS Conference (2010)
Category: Basic
Presenting Author: Dr Ernst-Jan M Speel