ABSTRACT
Organizing pneumonia (OP) is a common lung interstitial disease.On chest CT, the main imaging manifestations of OP are consolidation and/or nodules with air bronchogram and traction bronchiectasis, predominantly peribronchovascular and subpleural regions." Reverse halo" sign, band-like consolidation and paralobular consolidation are also can be seen.Migratory behavior of lesions may be evident in follow up studies.The diagnosis of OP is a comprehensive analysis based on imaging combined with clinical and pathological findings.
ABSTRACT
El signo del halo invertido se caracteriza por una opacidad central de vidrio esmerilado rodeado por una consolidación del espacio aéreo más densa en forma de una media luna o un anillo. El signo del halo invertido se ha informado en asociación con un am plia gama de enfermedades pulmonares, incluidas las infecciones fúngicas pulmonares invasivas, neumonía por pneumocystis, tuberculosis, neumonía adquirida en la comuni dad, granulomatosis linfomatoide, granulomatosis de Wegener, neumonía lipoidea y sarcoidosis. También se observa en neoplasmas pulmonares e infarto y después de ra dioterapia y ablación por radiofrecuencia de neoplasias malignas pulmonares. También es conocido como signo de halo en reversa o signo del atolón.
The reversed halo sign is characterized by a central groundglass opacity surrounded by denser airspace consolidation in the shape of a crescent or a ring. The reversed halo sign has been reported in association with a wide range of pulmonary diseases, in cluding invasive pulmonary fungal infections, pneumocystis pneumonia, tuberculosis, communityacquired pneumonia, lymphomatoid granulomatosis, Wegener granulomato sis, lipoid pneumonia and sarcoidosis. It is also seen in pulmonary neoplasms and in farction, and following radiation therapy and radiofrequency ablation of pulmonary malignancies. It is also known as a reverse halo sign or atoll sign