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Citation:
Weerakkody Y, Hacking C, Worsley C, et al. Pulmonary trunk dilatation. Reference article, Radiopaedia.org (Accessed on 16 Mar 2025) https://doi.org/10.53347/rID-88198
Dilatation of the pulmonary trunk or dilatation of the main pulmonary artery (mPA) has a range of causes, and is often (though not always) associated with pulmonary hypertension. Most publications suggest an upper limit of normal in the region of 29-33 mm 1, which can be higher in males 7. Other publications also suggest the pulmonary trunk to aortic ratio as an additional useful measure (where the normal ratio in most cases is around 1:1 or less).
Pathology
Aetiology
See also
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1. Ko J & Park H. Main Pulmonary Artery Dilatation in Patients with Anthracofibrosis. J Korean Med Sci. 2014;29(11):1577-82. doi:10.3346/jkms.2014.29.11.1577 - Pubmed
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2. Raymond T, Khabbaza J, Yadav R, Tonelli A. Significance of Main Pulmonary Artery Dilation on Imaging Studies. Ann Am Thorac Soc. 2014;11(10):1623-32. doi:10.1513/AnnalsATS.201406-253PP - Pubmed
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3. Aluja Jaramillo F, Gutierrez F, Díaz Telli F, Yevenes Aravena S, Javidan-Nejad C, Bhalla S. Approach to Pulmonary Hypertension: From CT to Clinical Diagnosis. Radiographics. 2018;38(2):357-73. doi:10.1148/rg.2018170046 - Pubmed
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4. Malviya A, Jha P, Kalita J, Saikia M, Mishra A. Idiopathic Dilatation of Pulmonary Artery: A Review. Indian Heart J. 2017;69(1):119-24. doi:10.1016/j.ihj.2016.07.009 - Pubmed
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5. Krishnan A, Babar J, Gopalan D. Imaging of Congenital and Acquired Disorders of the Pulmonary Artery. Curr Probl Diagn Radiol. 2012;41(5):165-78. doi:10.1067/j.cpradiol.2011.11.001 - Pubmed
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6. Edwards P, Bull R, Coulden R. CT Measurement of Main Pulmonary Artery Diameter. Br J Radiol. 1998;71(850):1018-20. doi:10.1259/bjr.71.850.10211060 - Pubmed
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7. Karazincir S, Balci A, Seyfeli E et al. CT Assessment of Main Pulmonary Artery Diameter. Diagn Interv Radiol. 2008;14(2):72-4. - Pubmed
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8. Papamatheakis D, Mocumbi A, Kim N, Mandel J. Schistosomiasis-Associated Pulmonary Hypertension. Pulm Circ. 2014;4(4):596-611. doi:10.1086/678507 - Pubmed
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