Javier Avendaño

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STUDY DESIGN Observational cross-sectional study. OBJECTIVE Using data from the population-based cancer registries of the Surveillance, Epidemiology and End Results (SEER) program, we analyzed demographic features, tumor and treatment characteristics, as well as survival rates in patients with primary malignant astrocytomas of the spinal cord (PMASC). (More)
One hundred autopsy eyes were examined by light microscopy. Corpora amylacea (CA) occurred in 93% of the cases. Histochemical stains showed that these deposits are composed of sulfated polysaccharides. The fine structure of CA showed delicate, straight 6 to 7 nm thick filaments best demonstrated with the Thiery stain. In three cases, electron-dense vesicles(More)
BACKGROUND The surgical management of deep intra-axial lesions still requires microsurgical approaches that utilize retraction of deep white matter to obtain adequate visualization. We report our experience with a new tubular retractor system, designed specifically for intracranial applications, linked with frameless neuronavigation for a cohort of(More)
OBJECTIVE Glioblastoma (GB) is rarely found in the cerebellum. Because of its rarity, it is poorly understood if cerebellar GB (CGB) behaves similarly to supratentorial GB. Studies have been limited to case reports and small case series. A better understanding of CGB may help guide treatment strategies. METHODS Surveillance, Epidemiology and End Results(More)
STUDY DESIGN Randomized controlled trial. OBJECTIVE To assess whether monitoring increases brace-wearing compliance in patients with adolescent idiopathic scoliosis (AIS). SUMMARY OF BACKGROUND DATA Noncompliance is a barrier to brace treatment of AIS. Studies have demonstrated that monitoring improves medication compliance; however, this has not been(More)
We studied ocular cryptococcosis in a 59-year-old man who had received extensive chemotherapy for abdominal malignant lymphoma. Mucinous lesions containing abundant cryptococci, but no inflammatory cells, formed in the posterior choroid of the eye. Electron microscopy revealed that mucin, a filamentous substance, coated the encapsulated organisms. Except(More)
The life-cycle of Callibia diana Stål is described and linear and geometric morphometrics are used for studying allometrics and shape changes throughout this neotropical mantid species' life-cycle. Significant changes were expected in the allometry and shape of the raptorial leg and abdomen, given the importance of hunting and reproduction. The allometric(More)
OBJECT The object of this study was to determine the relationship between plasma taurine and subarachnoid hemorrhage (SAH) outcome. METHODS Forty patients with SAH and mild neurological deficits were included in this prospective, blinded cohort study. Plasma taurine levels were measured using high-performance liquid chromatography on admission and were(More)
INTRODUCTION Treatment of children with early onset scoliosis (EOS) seeks to improve natural history and health related quality of life (QOL). QOL measurement presents a significant challenge given the young age, comorbidities, and heterogeneity of this population. OBJECTIVE To develop a disease specific measure reflecting issues of importance to EOS(More)