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