El término «patrón nodular» hace referencia a lesiones nodulares pequeñas y múltiples en el parénquima pulmonar. La localización de los nódulos en relación con las estructuras del lobulillo pulmonar secundario permite estrechar el diagnóstico diferencial y categoriza el patrón nodular en perilinfático, centrolobulillar y aleatorio. El patrón miliar de tipo aleatorio, aunque comúnmente vinculado a la tuberculosis, es una manifestación radiológica presente en varias afecciones, destacando las infecciones fúngicas y las metástasis. Clínicamente estas afecciones cursan con signos y síntomas similares e inespecíficos, siendo el estudio histopatológico el método de referencia para el diagnóstico. Los hallazgos radiográficos dependen principalmente del estado inmunitario del huésped y de la carga exposicional.
The term "nodular pattern" refers to small and multiple nodular lesions in the lung parenchyma. The location of the nodules in relation to the structures of the secondary pulmonary lobule allows narrowing the differential diagnosis and categorizes the nodular pattern into perilymphatic, centrilobular and random. The random-type miliary pattern, although commonly linked to tuberculosis, is a radiological manifestation present in several conditions, highlighting fungal infections and metastases. Clinically, these conditions present similar and non-specific signs and symptoms, the histopathological study being the reference method for diagnosis. Radiographic findings depend mainly on the immune status of the host and the exposure load.
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