Browsing by Author "Leon Rojas, Jose"

Now showing 1 - 4 of 4
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    Anatomía Radiológica: Una visión para el estudiante
    (SOLCA, Núcleo de Quito, UIDE., 2021-09-08) Puente Vallejo, Raúl; Leon Rojas, Jose; Rivas, Gabriela
    El libro presenta una visión clara y estructurada de los principios físicos de los principales estudios de imagen, además de la aplicación del lenguaje radiológico, complementado con un atlas descriptivo de las estructuras anatómicas desde las diferentes modalidades de estudios.
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    Anatomía Radiológica: Una visión para el estudiante(2da Ed.)
    (SOLCA, Núcleo de Quito., 2023-05) Puente Vallejo, Raúl; Leon Rojas, Jose; Rivas, Gabriela; Acosta Freire, Mishelle
    La segunda edición contempla una visión más amplia de la Anatomía Radiológica, generada desde la posibilidad que brinda la virtualidad de manipular las imágenes presentadas en el libro. El enfoque pensado en el estudiante así como la rigurosidad científica con la que se ha escrito, hacen de esta segunda edición un elemento de mucha ayuda en la formación académica de todos los profesionales de la salud.
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    Management of an Unusual Central Nervous System Metastasis With Linear Accelerator Radiosurgery in a Low-Middle Income Country
    (Cureus, 2021-11-22) Mosquera, Martín; Leon Rojas, Jose; Puente Vallejo, Raúl
    Large cell neuroendocrine carcinoma, a type of non-small cell lung cancer, is quite rare and has been associated with brain metastasis, mainly to the cerebral hemispheres. However, the rate of cerebellar metastasis is underreported in the literature and appears to be quite rare. Despite the rarity of this metastasis, treatment guidelines for both supratentorial and cerebellar lesions have been established by using either radiosurgery or whole-brain radiation therapy. The choice of modality must take into consideration the vicinity of relevant structures such as the brainstem and its multiple nuclei. Here we report the case of a 68-year-old male, resident of a rural community in the Andean region of Ecuador, a lowmiddle income country; with the diagnosis of a large cell neuroendocrine carcinoma of the lung with dual central nervous system metastasis treated with linear particle accelerator radio-surgery due to its versatility and cost-effectiveness in a resource-limited setting. We showcase the rarity of the metastatic lesions as well as the utility of linear accelerators and their versatility to perform precise radiosurgical procedures in two simultaneous locations.
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    Technological Improvements in Low- and Middle-Income Countries (LMICs): A Review of the Literature and the “Sociedad de Lucha Contra el Cáncer” (SOLCA) Institutional Experience in Neuro-Radiosurgery During the Coronavirus Disease 2019 (COVID-19) Pandemic
    (World Neurosurgery, 2022-06-18) Ochoa, Pamela; Loza, Felipe; Cueva, Fiorella; Leon Rojas, Jose; Puente Vallejo, Raúl
    OBJECTIVE: Neurosurgery is a medical field that requires specialized professionals and equipment, 2 important but scarce resources in low- and middle-income countries. Our goal was to report our experience with the replacement and implementation of linear accelerators with radiosurgery capabilities at “Sociedad de Lucha Contra el Cáncer” (SOLCA) Hospital in Quito, Ecuador, and give some recommendations for future technological replacements (TRs). - METHODS: Two surveys were performed in SOLCA’s radiosurgery department, one before the TR was finalized and one after, consisting of an open and multiple-choice questionnaire. Questions focused on the performance of the new equipment, perceptions regarding the training, and the influence of the pandemic on the whole process. In addition, we share our experience regarding the difficulties and benefits of TR at SOLCA. - RESULTS: The most-reported limitation was lack of training (48%). By the time of the second survey, 95.2% of the staff had already treated patients or planned a radiosurgical procedure; 42.9% considered training to have been adequate, and 76.2% felt that the pandemic hindered the training process. Currently, 33 radiosurgeries have been done (26 for the central nervous system and 7 stereotactic radiation body therapies). - CONCLUSIONS: The TR in SOLCA had similarities with other experiences in low- and middle-income countries, but the pandemic brought additional limitations, mainly complicating the staff training. Nevertheless, those limitations can be resolved with a structured training program and international collaboration. Overall, the benefits obtained from a TR result in exponentially better medical care and accessibility to novel treatments.