BACKGROUND Head and neck paragangliomas (PGL) are rare, mostly benign tumors. About 10% to 15% of PGL are caused by mutations in the succinate dehydrogenase genes B, C, or D and may appear multifocally. METHODS AND RESULTS A retrospective review of 120 patients with 146 head and neck PGL, including 46 carotid body tumors (CBT), 13 vagal tumors, 55 jugulotympanic tumors (JTT), 25 tympanic tumo...

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Measurements of the dielectric constant 1>2, the elastic moduli 3, the double refraction 4 and of the thermally stimulated current glow curves 5 made on ice at low temperatures exhibit an anomalous be­ haviour in the temperature range around 100 °K. It has been suggested by several authors that the anomalies are a result of a ferroelectric transition of the crystal from a disordered to an order...

We have measured deuteron elastic scattering cross sections at 110 MeV on C and Pb, and at 120 MeV on C and Ni, with the Texas ARM K500 cyclotron. The motivation for this experiment is that, except for some limited data above 200 MeV [1], there exists no elastic scattering data above 90 MeV. In order to calculate deuteron optical potentials in the energy range accessible by the K500 cyclotron, ...