Pilocytic Astrocytoma Following Radiotherapy For Craniopharyngioma: Case Report.

Administration of fractionated doses of irradiation is part of the adjutant therapy for CNS tumours such as craniopharyngiomas and pituitary adenomas. It can maximise cure rates or expand symptom-free period. Among the adverse effects of radiotherapy, the induction of a new tumour within the irradiated field has been frequently described. The precise clinical features that correlate irradiation and oncogenesis are not completely defined, but some authors have suggested that tumors are radiation induced when they are histologically different from the treated ones, arise in greater frequency in irradiated patients than among normal population and tend to occur in younger people with an unusual aggressiveness. In this article, we report a case of a papillary astrocytoma arising in a rather unusual latency period following radiotherapy for craniopharyngioma.58731-

Influenza dell’incrudimento, dello stato superficiale e del trattamento termico sulla cessione del nickel nelle principali leghe impiegate in occhialeria

La molteplicità delle leghe e delle lavorazioni utilizzate nella fabbricazione di montature metalliche per occhiali ha suggerito di analizzarne l’influenza sulla cessione di nickel. A tale scopo sono stati presi in considerazione alcuni acciai inossidabili austenitici (AISI 302, 304L, 304, 316L e un acciaio nickel-free di recente produzione) e ferritici (AISI 430), nonché le leghe tradizionalmente usate nel settore (alpacca 62-18 e monel 400), in differenti condizioni di trattamento termico, di incrudimento per trazione e martellatura, nonché di stato superficiale. I risultati sperimentali della prova di rilascio di nickel evidenziano un pessimo comportamento delle leghe tradizionali in ogni condizione e un’ottima tenuta di tutti gli acciai inossidabili, con l’eccezione dell’AISI 302 dopo un riscaldamento che ne simulasse la brasatura. Sembra che la deformazione a freddo migliori il pur ottimo comportamento alla cessione di Ni, tranne che per l’acciaio austenitico senza nickel. Lo stato superficiale non influenza in alcun modo la prova di cessione

Saphenous vein graft bypass in the treatment of giant cavernous sinus aneurysms - Report of two cases

Two cases of giant intracavernous aneurysms treated by high now bypass with saphenous vein graft between the external carotid artery (ECA) and branches of the middle cerebral artery (MCA) are presented. Very often these aneurysms are unclippable because they are fusiform or have a large neck, Occlusion of the internal carotid artery (ICA) is the treatment of choice in many eases, This procedure has however a high risk of brain infarction. Revascularization of the brain by extra-intracranial anastomosis between the superficial temporal artery (STA) and branches of the MCA is frequently performed. This procedure provides however a low flow bypass and brain infarction may occur, We report two cases of giant cavernous sinus aneurysms treated by high flow bypass and endovascular balloon occlusion of the LCA, Immediate high now revascularization of MCA branches was achieved and the patients showed no ischemic events. Follow-up of 8 and 14 months alter operation shows patency of the venous graft and no neurological deficits, Angiographic control examination showed complete aneurysm occlusion in both cases.58116216

Serum electrophoretic fraction of Argentinian "pejerrey" from <i>Basilichthys</i> genus

Se realiza el estudio de polimorfismo comparativo de fracciones séricas, por fraccionamiento electroforético horizontal sobre gel de almidón hidrolizado realizado con especimenes de pejerreyes del género Basílíchthys de abolengo marino procedentes de Punta Rasa, y de agua dulce provenientes de Punta Lara (río de la Plata), también de distintas lagunas de la provincia de Buenos Aires. Se analizaron 40 muestras de cada procedencia. Observáronse claras diferencias entre las muestras de Punta Rasa respecto a las de agua dulce, siendo asimismo distintas las de río respecto a las de laguna. Las muestras de cada clase mostraron constancia de caracteres entre sí. Trabajos realizados por diversos autores a nivel de caracteres endo y exosomáticos determina la dificultad de la exacta diferenciación de los pejerreyes de agua dulce (B. bonaríensis) y marinos (B. argentinensis), constituyendo un escollo para la ubicación sistemática de este grupo (Zaro, 1974). Las diferencias obtenidas de los sueros de pejerreyes provenientes del río de la Plata Punta Lara y las lagunas de la provincia de Buenos Aires, inducen a la necesidad de profundizar y complementar los estudios comparativos con la posible incorporación a los mismos de marcadores genéticos, junto a otros aspectos investigativos que permitan determinar con mayor fidelidad sus relaciones filogenéticas y sistemáticas.It is made a comparative study of serum fractions, by horizontal electrophoretic on starch gel, using individuals from Basilichthys genus, of marine lineage, belonging form Punta Rasa, and free water from Punta Lara (Río de La Plata) and also from different lakes of Buenos Aires province. They were analyzed forty samples of each place. They were observed clear differences between Punta Rasa and free water samples, and they are also differences between river and lake samples. The samples from each place showed similar characteristics. Different authors made works about endo and exosomatical characters and they found very difficult the exactly differentiation of free water “pejerrey” (B. Bonaríensis) and marine one (B. argentinensis) being an inconvenient in the systematic placement of this group (Zaro, 1974). Differences among serum samples from Río de la Plata, Punta Rasa and Buenos Aires province lakes, induce to go deep into comparative studies including Genetic Markers, to other aspects of research which allow to determine more creditable its Phylogenetic and Systematic relations.Facultad de Ciencias Veterinaria

Serum electrophoretic fraction of Argentinian "pejerrey" from <i>Basilichthys</i> genus

Se realiza el estudio de polimorfismo comparativo de fracciones séricas, por fraccionamiento electroforético horizontal sobre gel de almidón hidrolizado realizado con especimenes de pejerreyes del género Basílíchthys de abolengo marino procedentes de Punta Rasa, y de agua dulce provenientes de Punta Lara (río de la Plata), también de distintas lagunas de la provincia de Buenos Aires. Se analizaron 40 muestras de cada procedencia. Observáronse claras diferencias entre las muestras de Punta Rasa respecto a las de agua dulce, siendo asimismo distintas las de río respecto a las de laguna. Las muestras de cada clase mostraron constancia de caracteres entre sí. Trabajos realizados por diversos autores a nivel de caracteres endo y exosomáticos determina la dificultad de la exacta diferenciación de los pejerreyes de agua dulce (B. bonaríensis) y marinos (B. argentinensis), constituyendo un escollo para la ubicación sistemática de este grupo (Zaro, 1974). Las diferencias obtenidas de los sueros de pejerreyes provenientes del río de la Plata Punta Lara y las lagunas de la provincia de Buenos Aires, inducen a la necesidad de profundizar y complementar los estudios comparativos con la posible incorporación a los mismos de marcadores genéticos, junto a otros aspectos investigativos que permitan determinar con mayor fidelidad sus relaciones filogenéticas y sistemáticas.It is made a comparative study of serum fractions, by horizontal electrophoretic on starch gel, using individuals from Basilichthys genus, of marine lineage, belonging form Punta Rasa, and free water from Punta Lara (Río de La Plata) and also from different lakes of Buenos Aires province. They were analyzed forty samples of each place. They were observed clear differences between Punta Rasa and free water samples, and they are also differences between river and lake samples. The samples from each place showed similar characteristics. Different authors made works about endo and exosomatical characters and they found very difficult the exactly differentiation of free water “pejerrey” (B. Bonaríensis) and marine one (B. argentinensis) being an inconvenient in the systematic placement of this group (Zaro, 1974). Differences among serum samples from Río de la Plata, Punta Rasa and Buenos Aires province lakes, induce to go deep into comparative studies including Genetic Markers, to other aspects of research which allow to determine more creditable its Phylogenetic and Systematic relations.Facultad de Ciencias Veterinaria

Serum electrophoretic fraction of Argentinian "pejerrey" from <i>Basilichthys</i> genus

Se realiza el estudio de polimorfismo comparativo de fracciones séricas, por fraccionamiento electroforético horizontal sobre gel de almidón hidrolizado realizado con especimenes de pejerreyes del género Basílíchthys de abolengo marino procedentes de Punta Rasa, y de agua dulce provenientes de Punta Lara (río de la Plata), también de distintas lagunas de la provincia de Buenos Aires. Se analizaron 40 muestras de cada procedencia. Observáronse claras diferencias entre las muestras de Punta Rasa respecto a las de agua dulce, siendo asimismo distintas las de río respecto a las de laguna. Las muestras de cada clase mostraron constancia de caracteres entre sí. Trabajos realizados por diversos autores a nivel de caracteres endo y exosomáticos determina la dificultad de la exacta diferenciación de los pejerreyes de agua dulce (B. bonaríensis) y marinos (B. argentinensis), constituyendo un escollo para la ubicación sistemática de este grupo (Zaro, 1974). Las diferencias obtenidas de los sueros de pejerreyes provenientes del río de la Plata Punta Lara y las lagunas de la provincia de Buenos Aires, inducen a la necesidad de profundizar y complementar los estudios comparativos con la posible incorporación a los mismos de marcadores genéticos, junto a otros aspectos investigativos que permitan determinar con mayor fidelidad sus relaciones filogenéticas y sistemáticas.It is made a comparative study of serum fractions, by horizontal electrophoretic on starch gel, using individuals from Basilichthys genus, of marine lineage, belonging form Punta Rasa, and free water from Punta Lara (Río de La Plata) and also from different lakes of Buenos Aires province. They were analyzed forty samples of each place. They were observed clear differences between Punta Rasa and free water samples, and they are also differences between river and lake samples. The samples from each place showed similar characteristics. Different authors made works about endo and exosomatical characters and they found very difficult the exactly differentiation of free water “pejerrey” (B. Bonaríensis) and marine one (B. argentinensis) being an inconvenient in the systematic placement of this group (Zaro, 1974). Differences among serum samples from Río de la Plata, Punta Rasa and Buenos Aires province lakes, induce to go deep into comparative studies including Genetic Markers, to other aspects of research which allow to determine more creditable its Phylogenetic and Systematic relations.Facultad de Ciencias Veterinaria

Creole cattle natural antibodies: are they genetic markers?

Los “anticuerpos naturales” del suero, en Bovinos Criollos, orientan otra pauta de los “Marcadores genéticos sanguíneos” para IDENTIFICACION Y PRESERVACION de su GERMOPLASMA. Se trabajó con dos rodeos de 82 Bovinos Criollos, aplicando la metodología siguiente: a) Extracción de muestras de sangre a cada animal por vía yugular, b) Tipificación sanguínea por el “Método hemolítico” con fijación de Complemento Fresco de Conejo, c) Especificidad de los Inmunosueros Naturales “anti-factores sanguíneos”, por “absorciones” con eritrocitos bovinos de Grupos Sanguíneos conocidos. Se detectaron anti-J anti-V, etc. Se comprueba que la producción natural de anticuerpos antifactores sanguí- neos en Bovinos, cualquiera sea su especificidad, invariablemente está asociada a la negatividad del Sistema J, considerándose, además, que no es improbable que el gene o genes vinculados a esta particularidad, pongan en juego algún mecanismo defensivo en individuos de alta resistencia en Areas Marginales. Se discute si los anticuerpos naturales representarían un nuevo tipo de Marcadores Inmunogenéticos.Serum natural antibodies in creole Cattle bear other patterns of the “blood genetic markers” for their GERMPLASM IDENTIFICATION and their corresponding PRESERVATION. We worked with several herd or Creole Cattle (Criollos) from different areas of Argentina, but this report corresponds to two herds of 82 Creole Cattle or “Criollos” from Experimental Farm of Balcarce - INTA - (Argentina) using the following methodology. a) the blood samples of each animal (sera and red cells) were collected from yugular vein, b) red cell samples from every animal were typed with 60 reagents (From Iowa State University, USA), plus some replicate and experimental Argentine reagents, plus rabbit complement (Selected rabbit sera stored fresh frozen), c) specificity of natural “anti-blood factors” isoimmunosera were determined by absorptions using bovine red cells of well-know blood groups. It was detected anti-J, anti-V, one serum that reacts as anti-M, and others not identified antibodies. The increasing number of discoveries of specific and differential blood group and histocompatibility antigens, with its corresponding natural antibodies and those produced by immunization, has enriched the knowledged of the animal genetic individuality. When it was disposable family inheritance data on this phenomenon were studied. It is discussed if natural isoantibodies of bovine normal sera would represent a new type of Immunogenetic Markers; or whether natural isoantibodies are alsoundcr the influence of associated environmental factors.Facultad de Ciencias Veterinaria