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Reverse halo ring

Radiolucent halo

We report a 64 years old female admitted with fever, cough, dyspnea and lung opacities on the chest X ray. A chest tomography scan (CTS) showed multiple-bilateral ring-shaped opacities and the reversed halo sign (RHS). The patient did not improve with antimicrobial therapy (AT). Infection and rheumatologic causes were excluded, therefore Cryptogenic organizing pneumonia (COP) was suspected with compatible percutaneous biopsy. Systemic steroids were started with a good clinical response. The patient was discharged four weeks after admission in good general conditions and practically no lungs opacities.

The following is a clinical case of organized pneumonia with the inverted halo sign as a radiological manifestation. Organized pneumonia is a well-defined entity, with diverse imaging characteristics, it can be due to numerous pathologies, acquiring the character of cryptogenic when no cause is found. Among the radiological manifestations, the inverted halo sign is observed in only one fifth of patients with the disease, and appears to be relatively specific for making a diagnosis of cryptogenic organizing pneumonia on computed tomography (CT)3,4.

Causas del signo de halo

Algunas de las tecnologías que usamos son necesarias para funciones básicas como la seguridad y la integridad del sitio, la autenticación de la cuenta, las preferencias de seguridad y privacidad, datos internos de uso del sitio y mantenimiento, y para que el sitio funcione correctamente mientras exploras y durante las transacciones.

Las piezas de encargo y especiales han sido creadas según sus especificaciones exactas, personalizadas con piedras particulares, o diseñadas con su aprobación y no son retornables. Los anillos que sean superiores a la talla 11 o inferiores a la talla 4 no se pueden devolver. Si tiene alguna pregunta sobre la política de devoluciones de un artículo que le interesa, no dude en preguntar.

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Los anillos con bandas lisas pueden cambiarse de tamaño hacia arriba o hacia abajo si es necesario, pero los anillos con diamantes engastados en las bandas sólo pueden cambiarse de tamaño una pequeña cantidad en cualquier dirección, por lo que es muy importante que el anillo se pida en el tamaño correcto. Si no está seguro del tamaño del anillo que necesita, solicite un medidor de anillos al pasar por caja y le enviaremos uno por correo.

Rising air sign

We report a 64 years old female admitted with fever, cough, dyspnea and lung opacities on the chest X ray. A chest tomography scan (CTS) showed multiple-bilateral ring-shaped opacities and the reversed halo sign (RHS). The patient did not improve with antimicrobial therapy (AT). Infection and rheumatologic causes were excluded, therefore Cryptogenic organizing pneumonia (COP) was suspected with compatible percutaneous biopsy. Systemic steroids were started with a good clinical response. The patient was discharged four weeks after admission in good general conditions and practically no lungs opacities.

The following is a clinical case of organized pneumonia with the inverted halo sign as a radiological manifestation. Organized pneumonia is a well-defined entity, with diverse imaging characteristics, it can be due to numerous pathologies, acquiring the character of cryptogenic when no cause is found. Among the radiological manifestations, the sign of the inverted halo is observed in only one fifth of patients with the disease, and appears to be relatively specific for making a diagnosis of cryptogenic organizing pneumonia on computed tomography (CT)3,4.

Aspergillus halo sign

The inverted halo sign (IHS) was first described by Voloudaki et al. in 1996 in two cases of cryptogenic organizing pneumonia. Kim et al. in 2003 adopted the term inverted halo signs and it is now included in the Fleishner Society’s glossary of terms.  SHI describes a central ground-glass opacity surrounded by a more or less complete ring of peripheral consolidation on high-resolution CT (HRCT). Also called atoll sign because of its resemblance to a coral atoll (Fig. 1).

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Fereidoun G. Abtin, Jilbert Eradat, Antonio J. Gutierrez, Christopher Lee, Michael C. Fishbein, Robert D. Suh. Radiofrequency Ablation of Lung Tumors: Imaging Features of the Postablation Zone. RadioGraphic; 947-967.

Edson Marchiori, Gláucia Zanetti, Gustavo Souza Portes Meirelles, Dante L. Escuissato4 Arthur Soares Souza, Jr, Bruno Hochhegger. The Reversed Halo Sign on HighResolution CT in Infectious and Noninfectious Pulmonary Diseases. AJR:197, July 2011.

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