Abstract library

200 results for "malignant pheochromocytoma".
#177 Dissociation Between Iodine-131 meta-iodobenzylguanidine (MIBG) Scintigraphy and Radiolabeled Octreotide in the Localization and Management of Sporadic Malignant Pheochromocytoma: An Impact on Management
Introduction: The Rx of malignant pheochromocytomas w/negative MIBG scan remains a challanging problem. Octreoscan is helpful in localization and Rx planning in such cases. Rx using SST analog & PRRT is a desirable goal.
Conference: 8th Annual ENETS Conference (2011)
Category: Clinical
Presenting Author: Dr. Mohammed NMI Ahmed
Authors: Ahmed M
#142 The role of 18F DOPA-PET in a case of malignant pheochromcytoma
Introduction: Pheocromocytoma is a rare tumor arising from chromaffin cells of adrenal medullary or extra adrenal paraganglionic tissue. Histological criteria cannot differentiate benign from malignant pheocromocytomas. The diagnosis of a malignant pheocromocytoma requires local invasion, recurrence and documented metastatic disease. The radionuclide scanning (123I - 131I-MIBG) is a fundamental diagnostic tool used to confirm the biochemical and radiological diagnosis of pheochromocytoma. In fact, MIBG scanning may confirm that the visualised lesion in an adrenal gland is indeed a pheochromocytoma and detect extra-adrenal paraganglionic tissue. However, MIBG scans are negative in around 15% of benign pheochromocytomas and in up to 50% of malignant ones. Other radionuclide techniques (18FDG-PET, 18F-DOPA-PET, 18F-FDA-PET) have been successfully used in investigation of pheochromocytomas. 18F-DOPA-PET and 18F-FDA-PET have been reported to be highly sensitive and specific for benign pheochromocytomas, while 18FDG-PET can be useful for malignant lesions with higher metabolic activity.
Conference: 7th Annual ENETS Conference (2010)
Category: Clinical
Presenting Author: Prof. Laura De Marinis
#269 Expression of IGF/mTOR Pathway Components in Human Pheochromocytomas and In Vitro Inhibition of PC12 Rat Pheochromocytoma Cell Growth by mTOR Inhibitors
Introduction: The pathogenesis of pheochromocytomas (pheo) is poorly understood and malignant pheo need new treatment options. mTOR inhibitors, as sirolimus(S) and everolimus(E), are promising antineoplastic drugs.
Conference: 8th Annual ENETS Conference (2011)
Category: Basic
Presenting Author: MD Maria Cristina De Martino
#1838 A Rare Case of Ectopic Cushing's Syndrome
Introduction: Cushing's syndrome has an incidence of 0.7 - 2.4 per million people per year. In 15% of cases, it’s associated with non-pituitary tumors secreting ACTH. Pheochromocytoma accounts for 5% of ectopic ACTH secretion.
Conference: 14th Annual ENETS conference (2017)
Category: Clinical cases/reports
Presenting Author: Liva Steina
Authors: Steina L, Steina S, Pirags V, Ozolins A, ...
#850 Expression of IGF/mTOR Pathway Components in Human Pheochromocytomas and In Vitro Inhibition of PC12 rat Pheochromocytoma Cell Growth by mTOR Inhibitors alone and in Combination with the Dual IGFI-R/INS-R Antagonist OSI-906
Introduction: Dysregulation of the mTOR and IGF pathways have been suggested to be involved in the pathogenesis of pheochromocytomas (PCC). mTOR inhibitors, such as sirolimus (S) and everolimus (E), as well as IGFI-R antagonists such as OSI-906, could be new a treatment for malignant PPC.
Conference: 11th Annual ENETS Conference (2014)
Category: Non digestive NETs (bronchial, MTC, pheochromocytoma)
Presenting Author: MD Maria Cristina De Martino
#1305 PRRT for Malignant Pheochromocytomas and Paragangliomas: The Singapore General Hospital Experience
Introduction: In recent years, the use of 177Lu-DOTATATE radioisotope therapy has been expanded to patients with metastatic pheochromocytomas and paragangliomas (PCC/PGL). Although this is not the standard of care, treatment options are limited for those with MIBG negative disease. Our centre has treated over 40 patients with NETS with PRRT since 2012.
Conference: 13th Annual ENETS conference (2016)
Category: PRRT-Ablative therapies-Endoscopic treatment
Presenting Author: Dr Lih Ming Loh
#2218 More than Rare Pheochromocytomas: Bilateral and Hemorrhagic, Giant and Metastatic
Introduction: Pheochromocytomas (PCC) are rare neuroendocrine tumors. These catecholamine-secreting tumors, with an average size of 4.9cm, are multiple in 10% of cases. About 10% are malignant but distant metastases are rare. Non-traumatic adrenal hemorrhage is an unusual potentially fatal event seen in PCC.
Conference: 15th Annual ENETS conference (2018)
Category: Case reports
Presenting Author: Marisa Peralta Ferreira
#246 SDHB Loss Predicts Malignancy in Pheochromocytomas/Sympathethic Paragangliomas, but Not Through Hypoxia Signalling
Introduction: To date there is no reliable histopathological marker of malignancy for pheochromocytomas/sympathetic paragangliomas (PCC/PGL). It is well-known that PCC/PGL in the hereditary context of an SDHB germline mutation very often metastasize. The immunohistochemical loss of SDHB expression was recently shown to be a surrogate marker for the presence of an SDH germline mutation in PCC/PGL. SDHB loss is supposed to be tumorigenic via activation of hypoxia signals.
Conference: 8th Annual ENETS Conference (2011)
Category: Basic
Presenting Author: Dr Anja M Schmitt
#865 Diagnostic and Outcome Differences between Sporadic and Familial Cases of Pheochromocytoma and Paraganglioma: A Retrospective Cohort Study
Introduction: Hereditary Pheochromocytomas (PCC) and Paragangliomas (PGL) account for 30-35% of cases and have some clinically relevant peculiarities.
Conference: 11th Annual ENETS Conference (2014)
Category: Epidemiology/Natural history/Prognosis - Prognosis
Presenting Author: Guillermo Ropero Luis
#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