Total anomalous pulmonary venous connection x ray

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Cafer Zorkun, M.D., Ph.D. [2] Sahar Memar Montazerin, M.D.[3]; Keri Shafer, M.D. [4]; Priyamvada Singh, MBBS [5]; Assistant Editor-In-Chief: Kristin Feeney, B.S. [6]

Overview

The findings on chest radiography vary depending on the type of anatomic variant of total anomalous pulmonary venous connection (TAPVC). Snowman sign is considered pathognomonic for the diagnosis of total anomalous pulmonary venous connection.

X Ray

X-ray findings suggestive of the total anomalous pulmonary venous connection include:[1]

  • Unobstructed:
    • Snowman sign: A large supra cardiac shadow due to the anomalous pulmonary vein and persistent left superior vena cava can be seen, which together with normal cardiac shadow forms a snowman appearance.
      • This x-ray finding is considered pathognomonic for the diagnosis of total anomalous pulmonary venous connection.
    • Mild dilatation of the pulmonary arteries.
    • Mild cardiomegaly

Image

Chest x ray indicating snowman sign in supracardiac type of TAPVR[2]

References

  1. Golden, Richard L. (1960). ""SNOWMAN" HEART". JAMA. 173 (10): 1102. doi:10.1001/jama.1960.03020280042009. ISSN 0098-7484.
  2. Case courtesy of Dr Ian Bickle, Radiopaedia.org, rID: 36858

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