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AJR Teaching File: Solitary Pulmonary Nodule with Enhancing Rim Sign

John R. Muhm1 and Catherine C. Roberts

1 Both authors: Department of Radiology, Mayo Clinic College of Medicine, 13400 E Shea Blvd., Scottsdale, AZ 85259.


Figure 1
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  		Fig. 1A —84-year-old man with recent cough. (Reprinted with permission from Muhm JR, McCullough AE. The enhancing rim: a new sign of a benign pulmonary nodule. Mayo Clin Proc 2003; 78:1092-1096 [5]) Unenhanced CT scan through solitary pulmonary nodule shows homogeneous rounded soft-tissue mass.

 

Figure 2
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  		Fig. 1B —84-year-old man with recent cough. (Reprinted with permission from Muhm JR, McCullough AE. The enhancing rim: a new sign of a benign pulmonary nodule. Mayo Clin Proc 2003; 78:1092-1096 [5]) After administration of IV contrast material, nodule rim enhances more intensely than lower density central portion. Center of nodule (region of interest marked) enhanced 17 H.

 

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