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Congress: ECR25
Poster Number: C-17812
Type: Poster: EPOS Radiologist (educational)
Authorblock: I. S. D. Lacerda, A. A. S. M. Kalander, J. S. Pais, M. Fritzen, L. A. O. Gatto, T. D. G. O. D. A. De Paulo, C. S. Franco, E. K. U. Fonseca, M. V. Y. Sawamura; São Paulo/BR
Disclosures:
Iuri Shen De Lacerda: Nothing to disclose
Amr Ahmad Saleh Mustafa Kalander: Nothing to disclose
João Sakuray Pais: Nothing to disclose
Matheus Fritzen: Nothing to disclose
Luiza Altino Oliveira Gatto: Nothing to disclose
Thiago De Gaultier Oliveira Do Amarante De Paulo: Nothing to disclose
Camila Soares Franco: Nothing to disclose
Eduardo Kaiser Ururahy Fonseca: Nothing to disclose
Marcio Valente Yamada Sawamura: Nothing to disclose
Keywords: Lung, Thorax, Conventional radiography, CT, CT-Angiography, Education, Calcifications / Calculi, Metastases, Occupational / Environmental hazards
Learning objectives Propose a pattern-based approach to hyperdense lung lesions. Review specific imaging features of each CT pattern and recognise the main differential diagnoses. Understand the pathophysiology behind each hyperdense lesion through a case-based pictorial review.
Read more Background A case-based pictorial essay that will review different hyperdense pulmonary abnormalities identified through CT. The lesions were systematically classified into five different patterns:  [fig 1]
Read more Findings and procedure details The following representative diseases will be presented in each section: [fig 1] 1 - HYPERATTENUATING LINEAR OR RETICULAR OPACITIESa) Dendriform pulmonary ossification Pulmonary ossification can happen in a dendritic pattern. Idiopathic or secondary to cardiopulmonary and systemic disorders (fibrosing lung diseases, mitral stenosis, Goodpasture syndrome). [fig 2] [fig 3] Chronic tissue injury and recurrent alveolar hemorrhage initiate calcium salt and interstitial metallic deposition, causing metaplastic ossification. Calcium and phosphate serum levels are normal. Mature bone spicules can be seen as branching hyperattenuating reticular opacities, localized or diffuse, mainly peripheral and in...
Read more Conclusion A pattern-based approach to hyperdense pulmonary lesions enhances radiological accuracy and helps narrowing differential diagnoses. It is important to remember that patterns can occasionally overlap and certain conditions may manifest as a spectrum within these patterns. [fig 2]
Read more References Egashira, R., Jacob, J., Kokosi, M. A., Brun, A.-L., Rice, A., Nicholson, A. G., Wells, A. U., & Hansell, D. M. (2017). Diffuse Pulmonary Ossification in Fibrosing Interstitial Lung Diseases: Prevalence and Associations. Radiology, 284(1), 255–263.  https://doi.org/10.1148/radiol.2017152419 Chai, J. L., & Patz, E. F. (1994). CT of the lung: patterns of calcification and other high-attenuation abnormalities. American Journal of Roentgenology, 162(5), 1063–1066.  https://doi.org/10.2214/ajr.162.5.8165982 Liu, Y., Jin, Z., Zhang, H., Zhang, Y., Shi, M., Meng, F., Sun, Q., & Cai, H. (2018). Diffuse...
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