Degenerative Atypia in Clival Chordoma: Two Case Reports.

In this study, we report surgical management combined with radiotherapy in two patients with typical chordoma. Different types of radiation have varied effects on chordomas when they are radiated. Classical cases display cellular atypia and fibrosis following irradiation, while necrosis and fibrosclerosis are observed after carbon ion therapy, implying that it is possible to control the tumor more effectively using carbon ion therapy with minimal side effects.

Radioactive Standards Laboratory ININ as a reference laboratory in Mexico.

The Radioactive Standards Laboratory of the National Institute of Nuclear Research is the National reference laboratory for the measurement of radioactivity in Mexico. It has a gamma-ray spectrometry system with a high-purity Ge-detector for measurements from 50 keV to 2000 keV, and develops standardized radioactive (beta-particle and gamma-ray emitting) sources in different geometries with uncertainties less than or equal to 5% for applications such as the calibration of radionuclide calibrators (clinically used dose calibrators), Ge-detectors and NaI(Tl) detectors.

[Cervical arthrodesis by means of interbody fusion with autologous bone and/or interbody spacer for cervical disc disease].

Unlabelled: The purpose of this study was to compare the results of cervical arthrodesis performed through interbody fusion with autologous bone and/or interbody spacer for cervical disc disease.

Material And Methods: Comparative cross-sectional study that included 49 patients who underwent surgery for anterior arthrodesis between January and December 2011, whose clinical records were reviewed.

Results: We included 49 patients: 20 (40.