Abstract Library

#946 Immunohistochemical Staining of Catecholamine-Synthesizing Enzymes in Head and Neck Paraganglioma Tissue

Introduction: Head and neck paragangliomas (HNPGLs) are non-producing neuroendocrine tumors, alhough 19-28% of patients have an increased dopamine production. The high sensitivity of 18F-DOPA PET also shows that these tumors might be able to synthesize catecholamines.

Conference: 11th Annual ENETSConcerence (2014)

Presenting Author:

Authors: Van der Horst-Schrivers A, Osinga T, Korpershoek E, De Krijger R, Kerstens M,

Keywords: paraganglioma, dopamine,

#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 ENETSConcerence (2011)

Presenting Author:

Authors: Schmitt A, Blank A, Korpershoek E, van Nederveen F, Rudolph T,

Keywords: SDHB loss, immunohistochemistry, pheochromocytoma, paraganglioma, malignancy, hypoxia,