Browsing by Author "Gómez, M."
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- ItemComprensión y producción de argumentación escrita en estudiantes de educación primaria(2020) Freire, Paulina de la Jara; Verdugo, S.; Grau, V.; Larrain, A.; Gómez, M.
- ItemDiseño de una escala ecográfica predictora de malignidad en nódulos tiroideos: Comunicación preliminar(2009) Domínguez, J.M.; Baudrand, R.; Arteaga, E.; Campusano, C.; González, G.; Mosso, L.; Fardella, C.; Arias, T.; Pizarro, A.; Gómez, M.; Cruz, F.; Torres, J.; Solar, A.; Cavada, G.; NCD Risk Factor Collaboration (NCD-RisC)Background: Thyroid nodules are common and associated to a low risk of malignancy. Their clinical assessment usually includes a fine neddle aspiration biopsy (FNAB). Aim: To identify ultrasonographic characteristics associated to papillary thyroid carcinoma (PTC) and generate a score that predicts the risk of PTC. Material and methods: Retrospective review of all fine needle aspiration biopsies of the thyroid performed in a lapse of two years. Biopsies that were conclusive for PTC were selected and compared with an equal amount of randomly selected biopsies that disclosed a benign diagnosis. Results: One hundred twenty two biopsies of a total of 1,498 were conclusive for PTC. Univariate analysis showed associations with PTC for the presence of micro-calcifications (Odds ratio (OR) 49.2: 95% confidence intervals (CI) 18.7-140.9), solid predominance (OR 25.1; 95% CI 6-220), hypoechogenicity (OR 23.5, 95% CI 6.5-122.6), irregular borders (OR 17, 95% CI 7.2-42.9), lymph node involvement (OR 12.3, 95% CI 2.7-112), central vascularization (OR 12.2, 95% CI 4.8-33.3), local invasion and hyperechogenicity (OR 0.2; CI 95% CI 0.03-0.6). Multivariate analysis disclosed microcalcifications (OR 28.1; CI 95% 8.9-89), hypoechogenicity (OR 9.4; 95% CI 1.5-59.5) and irregular borders (OR 4.7; CI 95% 1.5-15) as the variables independently associated with the presence of PTC. The prevalence of PTC in the presence of the three variables was 97.6% (Likelihood ratio (LR) 45) and 5.4% in their absence (LR 0.06). Conclusions: This scale predicts the presence or absence of PTC using simple ultrasound characteristics.
- ItemDwarf galaxies in the Antlia cluster: first results(2007) Castelli, A.V.S.; Bassino, L.P.; Cellone, S.A.; Richtler, T.; Dirsch, B.; Infante Lira, Leopoldo; Aruta, C.; Gómez, M.; Saviane, Ivo; Ivanov, Valentin D.; Borissova, Jordanka
- ItemNew VVV Survey Globular Cluster Candidates in the Milky Way Bulge(2017) Minniti, D.; Geisler, D.; Alonso, J.; Palma, T.; Beamin, J.; Borissova, J.; Catelan, Márcio; Claria, J.; Hempel, Maren; Contreras Ramos, Rodrigo Andrés; Cohen, R.; Días, B.; Fernández, J.; Gómez, M.; Ivanov, V.; Kurtev, R.
- ItemOrigen botánico y propiedades químicas de las mieles de la región mediterránea árida de Chile.(2003) Montenegro Rizzardini, Gloria; Pizarro, R; Avila. G.; Castro, R.; Ríos, C.; Muñoz, O.; Bas Mir, Fernando; Gómez, M.
- ItemThe curious case of the companion : evidence for cold accretion onto a dwarf satellite near the isolated elliptical NGC 7796(2018) Richtler, T.; Hilker, M.; Voggel, K.; Puzia, Thomas H.; Salinas, R.; Gómez, M.; Lane, R.
- ItemThe Globular Cluster System of NGC 1316 (Fornax A)(2001) Gómez, M.; Infante Lira, Leopoldo
- ItemThe globular cluster system of NGC 1316. IV. Nature of the star cluster complex SH2(2017) Richtler, T.; Husemann, B.; Hilker, M.; Puzia, Thomas H.; Bresolin, F.; Gómez, M.