Letters to Editor 4.

Joob B, Wiwanitkit V. Pulmonary sequelae of swine flu. Lung India 2013;30:81-2. 5. Marchiori E, Zanetti G, Hochhegger B, Rodrigues RS, Fontes CAP, Nobre LF, et al. High-resolution computed tomography findings from adult patients with Influenza A (H1N1) virus-associated pneumonia. Eur J Radiol 2010;74:93-8. 6. Marchiori E, Zanetti G, Mano CM, Hochhegger B, Irion KL. Follow-up aspects of Influenza A (H1N1) virus-associated pneumonia: The role of high-resolution computed tomography in the evaluation of the recovery phase. Korean J Radiol 2010:11:587. 7. Marchiori E, Zanetti G, Mano CM. Swine-origin Influenza A (H1N1) viral infection. Small airways disease. AJR 2010;195:W317. 8. Gómez-Gómez A, Martínez-Martínez R, Gotway MB. Organizing pneumonia associated with swine-origin influenza. A H1N1 2009 viral infection. AJR Am J Roentgenol 2011;196:W103-4. 9. Marchiori E, Hochhegger B, Zanetti G. Organising pneumonia as a late abnormality in influenza A (H1N1) virus infection. Brit J Radiol 2012;85:841. 10. Marchiori E, Zanetti G, Ferreira Francisco FA, Hochhegger B. Organizing pneumonia as another pathological finding in pandemic influenza A

(H1N1). Med Intensiva 2013;37:59. 11. Gill JR, Sheng ZM, Ely SF, Guinee DG, Beasley MB, Suh J, et al. Pulmonary pathologic findings of fatal 2009 pandemic influenza A/ H1N1 viral infections. Arch Pathol Lab Med 2010;134:235-43. 12. Marchiori E, Zanetti G, Fontes CA, Santos ML, Valiante PM, Mano CM, et al. Influenza A (H1N1) virus-associated pneumonia: High-resolution computed tomography — pathologic correlation. Eur J Radiol 2011;80:e500-4.

Access this article online Quick Response Code:

Website: www.lungindia.com

Spectacle sign Sir, We would like to highlight the importance of spectacle sign while interpreting chest X-ray. According to Sir Benjamin Felson, the father of chest radiography, spectacle sign is the presence of a round radio-opacity seen adjacent to an end on bronchus.[1] The pulmonary vessel appears as radioopacity while the bronchus appears as lucency adjacent to the radio-opacity. The two shadows together give the

appearance of spectacle sign as shown in [Figures 1 and 2]. We wish to emphasize that both clinicians and radiologists should be aware of this sign who are regularly seeing and interpreting chest X-rays. The presence of this sign may give an erroneous appearance of the abnormal nodular opacity, metastasis in a known primary, enlarged hila, broncholith, calcified lymph node or a bony pathology.

ACKNOWLEDGEMENT Dr. Akshay and Dr. Neha for their contribution

Binit Sureka, Mahesh Kumar Mittal, Aliza Mittal, Brij Bhushan Thukral Figure 1: Illustration of a spectacle sign

Department of Radiodiagnosis and Imaging, Vardhman Mahavir Medical College and Safdarjung Hospital, New Delhi, India E-mail: [email protected]


Felson B. Thoracic calcifications. In: Felson B, editor. Chest Roentgenology. 1st ed. Philadelphia: W.B. Saunders Co; 1995. p. 464-93.

Access this article online Quick Response Code:



Figure 2: (A) Chest X-ray showing the pulmonary vessel as radio-opacity (black arrow) and the accompanying bronchus as lucency (white arrow) adjacent to the pulmonary vessel giving appearance of a spectacle sign (B) magnified chest X-ray images depicting the spectacle sign 378

Website: www.lungindia.com DOI: 10.4103/0970-2113.120630

Lung India • Vol 30 • Issue 4 • Oct ‑ Dec 2013

Copyright of Lung India is the property of Medknow Publications & Media Pvt. Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use.

Spectacle sign.

Spectacle sign. - PDF Download Free
409KB Sizes 0 Downloads 0 Views