Abstract library

109 results for "64Cu-DOTATATE".
#2255 When Is Right Hemicolectomy Really Indicated for Pediatric Appendiceal NETs?
Introduction: Pediatric NET of the appendix (ANET) are rare tumors with unknown real incidence.For pediatric age initial staging procedures are not standardized and guidelines for pediatric patients with ANET do not exist.
Conference: 15th Annual ENETS conference 2018 (2018)
Category: Biomarkers
Presenting Author: MD,PhD Viera Bajciova
#18 Long-acting release octreotide induce complete response in type 1 gastric carcinoid tumors
Introduction: Gastric endocrine tumors (GET) are increasingly recognized due to expanding indications of upper gastrointestinal endoscopy. Often silent and benign, GET may also be aggressive when sporadic and may sometimes mimic the course of gastric adenocarcinoma. Current incidence of GETs is estimated at around 8% of digestive endocrine tumors. Yearly age-adjusted incidence is around 0.2 per population of 100,000. Gastric carcinoids (ECLomas) develop from gastric enterochromaffin-like cells (ECL cells) in response to chronically elevated gastrin. Type 1 tumors (ECLomas in the course of atrophic gastritis) may occur in conditions of achlorhydria secondary to auto-immune atrophic fundic gastritis. It occurs mostly in women and they are non-functioning tumors, typically found during upper GI endoscopy performed for dyspepsia. ECLomas present frequently as multiple polyps, usually < 1 cm in diameter in the gastric fundus. Type 1 tumors are almost exclusively benign lesions with little risk of deep invasion of the gastric parietal wall. The neoplastic ECL cells become progressively dedifferentiated with an increasing number of Ki-67 immunoreactive (IR) cell nuclei. In addition, there is a substantial decrease in argynophil and IR NE cells that can be visualized by conventional methods. ECLomas secondary to hypergastrinemia should be closely followed for signs of clinical and histopathological tumor progression. Such ECLomas deserve early, active, radical surgical treatment.
Traditionally, gastric carcinoid type 1 (GCA1s) are endoscopically or surgically removed, depending on the number, appearance and size of the tumors. Antrectomy, with surgical excision of the majority of the G cells, is thought to facilitate regression of these tumors by removing the source of excessive gastrin secretion; however, the long-term benefits of antrectomy still remain uncertain. Although proton pump inhibitors are effective in reducing hypergastrinemia-induced gastric acid hypersecretion in GCA2, they do not affect ECL-cell hyperplasia, and therefore their role in GCA1 is limited. Moreover, in selected cases, significant reduction of hypergastrinemia does not prevent development of ECL carcinoid, suggesting that, in addition to hypergastrinemia, other pathogenic or genetic factors may be involved. Treatment with somatostatin analogues (SSA) might impede ECL-cell hyperplasia by suppressing gastrin secretion and/or by a direct anti-proliferative effect on ECL cells. Treatment with SSAs in GCA1 leads to a substantial tumor load reduction, with a concomitant decrease of serum gastrin levels. Published data indicate an important anti-proliferative effect of SSA on ECL cells, providing clinical benefit and obviating, at least temporarily, the need for invasive therapies for GCA1. Morphometric studies demonstrated that, while antrectomy specifically decreased the volume of ECL cells versus the total volume of endocrine cells, octreotide reduces the overall endocrine cell volume. Although the number of treated patients is small, it has been suggested that SSA may exert important anti-proliferative effects either directly, by inhibiting ECL-cells proliferation, or indirectly through suppression of gastrin hypersecretion.
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: MD Ricardo Caponero
#37 Gastric GIST with synchronous neuroendocrine tumor of the pancreas, Case Report and Literature Review
Introduction: The Gastrointestinal Stromal Tumors (GIST) are the most common mesenchymal tumors of the gastrointestinal tract. These are rare tumors with an incidence of 15 new cases per million per year. They often occur in individuals over the age of 40 years, without gender predominance. The clinical behavior is variable and benign tumors are the most common. They can develop anywhere in the GI tract, but are more frequent in the stomach and small intestine. The primary treatment, when located, is the surgical resection, which can be complemented with the use of imatinib.
The occurrence of neuroendocrine tumors of the pancreas is rare, representing 1-5% of pancreatic cancers, and it is estimated that its incidence does not exceed 5 to one million. The tumors considered nonfunctioning (15-32% of pancreatic neuroendocrine tumors) are not associated with any syndrome, and are usually incidental. They have a slight predominance in males, and are more frequent in the 6th decade of life. Nonfunctioning tumors of islet cells are virtually all malignant tumors, and the treatment consists of surgical resection.
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: Dra Amelia B Tavares
#49 Twenty-year experience in diagnosis and treatment of insulinoma in Burdenko Surgery Clinic, Moscow Medical Academy, Russia
Introduction: For the last 20 years, 235 patients with the diagnosis of organic hyperinsulinismus were treated in Burdenko Surgery Clinic.
Conference: 7th Annual ENETS Conference (2010)
Category: Basic
Presenting Author: Prof Alexey Egorov
#51 Epidemiology of the neuroendocrine tumors diagnosed in Cardarelli Hospital: a retrospective single-institution analysis of 274 cases
Introduction: Neuroendocrine tumors (NETs) are considered rare tumors and are characterized by their ability to produce peptides that cause typical hormonal syndromes. Neuroendocrine tumors consist of a wide spectrum of malignancies with different histology that can arise from distributed neuroendocrine cells in the body. Although these tumors are frequently indolent, they can be aggressive and resistant to therapy. Its incidence in the U.S.A has been rising in the last three decades (Surveillance, Epidemiology, and End Results registry). NETs are more common than generally believed.
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: Dr Ferdinando Riccardi
#55 Metronomic combination therapy including temozolamide, bevacizumab and somatostatin analogue for the treatment of malignant gastroenteropancreatic neuroendocrine tumors
Introduction: Malignant gastroenteropancreatic neuroendocrine tumors (GEPNETS), mainly carcinoids, are not considered to be particularly chemotherapy-sensitive to conventional chemotherapeutic schemes. Long-standing evidence suggests these tumors to be highly vascularised and responsive to antiangiogenic strategies. Newest reports demonstrate benefit by the use of temozolamide, an oral alkylating agent similar to intravenous dacarbazine. The DNA repair enzyme O6-alkylguanine–DNA alkyltransferase (AGAT) confers cancer cell resistance to O6-alkylating agents such as temozolamide through its ability to remove methyl/alkyl groups from the O6-position of guanine, thus correcting drug-induced DNA damage.
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: DR Anna Koumarianou
#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
#75 Carcinoid and carcinoid syndrome: analysis of 110 cases from a single insitute
Introduction: Carcinoid syndrome (CS) often presents with flushing, diarrhea and carcinoid heart disease (CHD).
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: Emilio Bajetta
#90 The prognostic value of FDG-PET scan in neuroendocrine tumors: a retrospective analysis of 46 patients treated in one center
Introduction: Neuroendocrine tumors (NETs) are rare and generally indolent. For diagnostic purposes, the sensitivity of FDG-PET scan is known to be low in this setting, though when positive, its prognostic value is not well-defined in NET.
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: Dr Ivan Borbath
#105 A pilot study using biochemical markers to predict acrcinoid heart disease in patients with carcinoid disease
Introduction: Carcinoid heart disease (CHD) affects up to 15-70% of patients with carcinoid disease. Recent ENETS guidelines recommend regular echocardiographic assessment to screen for CHD. Chromogranin A (CgA) is a peptide widely used to monitor carcinoid disease progression. Neurokinin A is a tachykinin which may be a more sensitive measure of carcinoid disease progression and prognosis. N-terminal pro Brain Naturetic Peptide is used as a screening tool for heart failure and recent results suggest utility in the diagnosis of CHD.
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: Dr Christopher Wong