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DOI: 10.1148/radiol.2422052090
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Five-year Lung Cancer Screening Experience: CT Appearance, Growth Rate, Location, and Histologic Features of 61 Lung Cancers1

Rebecca M. Lindell, MD, Thomas E. Hartman, MD, Stephen J. Swensen, MD, James R. Jett, MD, David E. Midthun, MD, Henry D. Tazelaar, MD and Jayawant N. Mandrekar, PhD

1 From the Departments of Radiology (R.M.L., T.E.H., S.J.S.), Pulmonary and Critical Care Medicine (J.R.J., D.E.M.), Anatomic Pathology (H.D.T.), and Biostatistics (J.N.M.), Mayo Clinic, Charlton 2-290, 200 1st Street SW, Rochester, MN 55905. Received December 21, 2005; revision requested February 7, 2006; revision received April 12; accepted May 17; final version accepted June 30. Supported by grant RO1CA79935-04 from the National Cancer Institute. Address correspondence to R.M.L. (e-mail: lindell.rebecca{at}mayo.edu).


Figure 1A
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  		Figure 1a: (a–c) Three sequential transverse CT scans (5-mm section width) obtained 1 year apart show a grade 3 non-BAC adenocarcinoma (arrow) in the right middle lobe that became smaller after initial screening CT but enlarged on the subsequent scan.

 

Figure 1B
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  		Figure 1b: (a–c) Three sequential transverse CT scans (5-mm section width) obtained 1 year apart show a grade 3 non-BAC adenocarcinoma (arrow) in the right middle lobe that became smaller after initial screening CT but enlarged on the subsequent scan.

 

Figure 1C
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  		Figure 1c: (a–c) Three sequential transverse CT scans (5-mm section width) obtained 1 year apart show a grade 3 non-BAC adenocarcinoma (arrow) in the right middle lobe that became smaller after initial screening CT but enlarged on the subsequent scan.

 

Figure 2A
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  		Figure 2a: Tumor attenuation on transverse CT scans (5-mm section width). (a) Scan obtained through the right middle lobe shows a grade 2 BAC (arrow) with hazy increased attenuation, through which underlying lung architecture can be seen, consistent with a GG attenuation nodule. (b) Scan shows a grade 2 non-BAC adenocarcinoma (arrowhead) in left lower lobe with both GG and solid elements, consistent with a semisolid nodule. (c) Scan obtained through left lower lobe shows grade 3 non-BAC adenocarcinoma (arrow) with solid attenuation and spiculated margins.

 

Figure 2B
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  		Figure 2b: Tumor attenuation on transverse CT scans (5-mm section width). (a) Scan obtained through the right middle lobe shows a grade 2 BAC (arrow) with hazy increased attenuation, through which underlying lung architecture can be seen, consistent with a GG attenuation nodule. (b) Scan shows a grade 2 non-BAC adenocarcinoma (arrowhead) in left lower lobe with both GG and solid elements, consistent with a semisolid nodule. (c) Scan obtained through left lower lobe shows grade 3 non-BAC adenocarcinoma (arrow) with solid attenuation and spiculated margins.

 

Figure 2C
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  		Figure 2c: Tumor attenuation on transverse CT scans (5-mm section width). (a) Scan obtained through the right middle lobe shows a grade 2 BAC (arrow) with hazy increased attenuation, through which underlying lung architecture can be seen, consistent with a GG attenuation nodule. (b) Scan shows a grade 2 non-BAC adenocarcinoma (arrowhead) in left lower lobe with both GG and solid elements, consistent with a semisolid nodule. (c) Scan obtained through left lower lobe shows grade 3 non-BAC adenocarcinoma (arrow) with solid attenuation and spiculated margins.

 

Figure 1
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  		Figure A1: Modified Schwartz equation. a = largest diameter of the tumor, b = largest diameter perpendicular to a, t = interval between the two CT scannings, V = tumor volume, Vo = tumor volume at initial CT scanning, Vt = tumor volume at last CT scanning.

 




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