Supracricoid partial laryngectomy with crico-hyoido-epiglottopexy for glottic carcinoma with anterior commissure involvement

I tumori della glottide scoperti in fase precoce (T1-T2) possono essere trattati sia con la radioterapia, sia mediante un intervento chirurgico. Lo scopo del nostro studio è stato quello di analizzare la sopravvivenza ed i risultati funzionali della laringectomia parziale sopracricoidea con crico-ioido-epiglotto-pessia per trattare il carcinoma della glottide con coinvolgimento della commissura anteriore. Abbiamo condotto uno studio retrospettivo (1996-2013), che includeva pazienti sottoposti a laringectomia parziale sopracricoidea con crico-ioidoepiglotto- pessia per un carcinoma a cellule squamose della glottide coinvolgente la commissura anteriore. Prima dellintervento è stato inoltre effettuato uno staging completo con TC del collo e del torace, nonché una laringoscopia diretta in sospensione in anestesia generale. 53 pazienti sono stati inclusi nel nostro studio. Il periodo mediano di follow-up è stato di 124 mesi. La resezione tumorale è stata completa nel 96,2% dei casi. I tassi di sopravvivenza, specifica e senza recidiva, a 5 anni sono stati rispettivamente 93,7%, 95,6 e 87,7%. Il periodo medio di ricovero è stato di 18 giorni. I tempi medi trascorsi prima del decannulamento e prima della ripresa dellalimentazione per os sono stati rispettivamente 15 e 18 giorni. La laringectomia parziale sopracricoidea con crico-ioido-epiglotto-pessia è unopzione importante per la conservazione chirurgica della laringe. Tale approccio consente un adeguato controllo della malattia e buoni risultati funzionali, purchè le indicazioni siano seguite pedissequamente e la tecnica chirurgica sia perfetta

Rare-earth-activated glasses for solar energy conversion

The solar cells efficiency may be improved by better exploitation of the solar spectrum, making use of the down-conversion mechanism, where one high energy photon is cut into two low energy photons. The choice of the matrix is a crucial point to obtain an efficient down-conversion process with rare-earth ions. When energy transfer between rare earth ions is used to activate this process, high emission and absorption cross sections as well as low cut-off phonon energy are mandatory. In this paper we present some results concerning 70SiO2-30HfO2 glass ceramic planar waveguides co-activated by Tb3+/Yb3+ ions, fabricated by sol gel route using a top-down approach, and a bulk fluoride glass of molar composition 70ZrF4 23.5LaF3 0.5AlF3 6GaF3 co-activated by Pr3+/Yb3+ ion. Attention is focused on the assessment of the energy transfer efficiency between the two couples of rare earth ions in the different hosts

Factors influencing terrestriality in primates of the Americas and Madagascar

Among mammals, the order Primates is exceptional in having a high taxonomic richness in which the taxa are arboreal, semiterrestrial, or terrestrial. Although habitual terrestriality is pervasive among the apes and African and Asian monkeys (catarrhines), it is largely absent among monkeys of the Americas (platyrrhines), as well as galagos, lemurs, and lorises (strepsirrhines), which are mostly arboreal. Numerous ecological drivers and species-specific factors are suggested to set the conditions for an evolutionary shift from arboreality to terrestriality, and current environmental conditions may provide analogous scenarios to those transitional periods. Therefore, we investigated predominantly arboreal, diurnal primate genera from the Americas and Madagascar that lack fully terrestrial taxa, to determine whether ecological drivers (habitat canopy cover, predation risk, maximum temperature, precipitation, primate species richness, human population density, and distance to roads) or species-specific traits (body mass, group size, and degree of frugivory) associate with increased terrestriality. We collated 150,961 observation hours across 2,227 months from 47 species at 20 sites in Madagascar and 48 sites in the Americas. Multiple factors were associated with ground use in these otherwise arboreal species, including increased temperature, a decrease in canopy cover, a dietary shift away from frugivory, and larger group size. These factors mostly explain intraspecific differences in terrestriality. As humanity modifies habitats and causes climate change, our results suggest that species already inhabiting hot, sparsely canopied sites, and exhibiting more generalized diets, are more likely to shift toward greater ground use

An unusual palatine tonsil lesion

International audienceNo abstract availabl