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Pulmonary Tumorlets: CT Findings

Michelle S. Ginsberg1,2, Oguz Akin1, Debra M. Berger1,2, Maureen F. Zakowski3 and David M. Panicek1,2

1 Department of Radiology, Memorial Sloan-Kettering Cancer Center, 1275 York Ave., New York, NY 10021.
2 Weill Medical College of Cornell University, New York, NY 10021.
3 Department of Pathology, Memorial Sloan-Kettering Cancer Center, New York, NY 10021.



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  		Fig. 1A. —56-year-old woman with melanoma. CT scan shows dominant pulmonary nodule (thick arrow) and adjacent tiny nodule (thin arrow) in right middle lobe. Pathologic examination of wedge resection specimen revealed hyalinized nodule and tumorlet.

 


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  		Fig. 1B. —56-year-old woman with melanoma. Photomicrograph of histopathologic specimen of resected lung shows small rounded nest (arrows) of bland, somewhat spindled cells with scant cytoplasm. These cells are indistinguishable from cells of typical carcinoid tumor. No mitotic figures or necrosis is present. (H and E, x40)

 


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  		Fig. 2A. —72-year-old woman with lung cancer. CT scan shows dominant pulmonary nodule (arrow) in right lower lobe that proved at pathology to be adenocarcinoma.

 


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  		Fig. 2B. —72-year-old woman with lung cancer. CT scan obtained caudad to A shows tiny nodule (arrow) believed to represent tumorlet in right lower lobe, anterior to small linear opacity.

 

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