BackgroundPre-surgical planning in joint replacements allows an estimation of the size and position of the potential implant before surgery. Currently, there are two methods to estimate the size and position: Analogue and digital. This study aims to demonstrate that the hybrid technique is accurate and precise in pre-surgical planning of non-cemented Total Hip Replacement. MethodsConcordance-type study against a gold standard, as well as inter and intraobserver consistency evaluation of two orthopedic surgeons and two orthopedic surgery residents. Accuracy was calculated with the intraclass correlation coefficient (ICC), afterwards, the same calculation was done taking into account a margin of error of 1 size above and 1 size below. ResultsThirty-eight patients were included in the study. 19 women and 19 men. 22 prostheses (57.89%) were right-lateralized and 16 left (42.11%). 12 prostheses (31.57%) were Stryker and 26 Johnson & Johnson (68.43%) Acetabular cup correlation compared with the gold standard was moderate: ICC reported 0.45 (95% CI, 0.15-0.76). When adjusted by +/-1 size ICC was 0.48 (95% CI, 0.18-0.79). On the other hand, results from the femoral stem reported: ICC 0.85 (95% CI, 0.07-0.98). When adjusted by +/-1 size ICC was 0.86 (95% CI, 0.06-0.99). ConclusionsHybrid templating is a reliable substitute for analog or digital templating. It is quick and inexpensive; better results are observed in the femoral component. The level of expertise of the evaluator did not affect the accuracy of the planning. Level of evidence: Grade IV

Las vasculitis son un grupo de enfermedades que consisten en la inflamación dentro y alrededor de la pared de los vasos sanguíneos, lo que produce necrosis, y su extensión depende del tamaño y ubicación del vaso afectado. Se pueden manifestar en cualquier órgano, por lo que se consideran enfermedades sistémicas. Las vasculitis primarias son patologías poco comunes y difíciles de diagnosticar, porque sus signos y síntomas son inespecíficos y pueden confundirse con muchas otras patologías —como enfermedades infecciosas, neoplásicas o del tejido conjuntivo—. Por esta razón, para su diagnóstico es importante combinar los hallazgos clínicos, radiológicos, de estudios histopatológicos y de laboratorio. Esta revisión se enfocará en el papel de los hallazgos imagenológicos en el diagnóstico y monitoreo de las manifestaciones pulmonares y abdominales de las vasculitis más frecuentes.