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Assessment of pulmonary melanoma metastases with 18F-FDG PET/CT: which PET-negative patients require additional tests for definitive staging?

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Title: Assessment of pulmonary melanoma metastases with 18F-FDG PET/CT: which PET-negative patients require additional tests for definitive staging?
Authors: Mayerhoefer ME (AUTHOR), Prosch H (AUTHOR), Herold CJ (AUTHOR), Weber M (AUTHOR), Karanikas G (AUTHOR), Mayerhoefer, Marius E1 (AUTHOR), Prosch, Helmut (AUTHOR), Herold, Christian J (AUTHOR), Weber, Michael (AUTHOR), Karanikas, Georgios (AUTHOR)
Source: European Radiology. Nov2012, Vol. 22 Issue 11, p2451-2457. 7p.
Abstract: Objectives: To determine, in patients with melanoma, the dependence of PET sensitivity on pulmonary metastasis size, and to determine patients who require further evaluation for definite staging.Methods: Of 183 melanoma patients who underwent (18)F-fluorodeoxyglucose PET/computed tomography (CT) for staging or follow-up between January 2008 and June 2011, 38 patients (18 women and 20 men; mean age 62.0 ± 14.7 years) with one or more pulmonary metastases visible on CT were included in the retrospective study. Each pulmonary metastasis was rated as positive or negative on PET, and lesion size (maximum transverse diameter) was assessed on CT. PET sensitivity was calculated according to the lesions' size, in 2-mm steps.Results: A total of 181 pulmonary metastases were analysed. PET sensitivity was 7.9 % for lesions of 4-5 mm; 33.3 % for lesions of 6-7 mm; 56.8 % for lesions of 8-9 mm; 63.6 % for lesions of 10-11 mm; 100 % for lesions of 12-14 mm; and 100 % for lesions of at least 15 mm. The differences in sensitivity between the size groups were significant (P < 0.001) CONCLUSIONS: With current state-of-the-art PET/CT technology, additional tests are necessary for definitive staging of melanoma patients who have one or more PET-negative lung nodules less than 12 mm in diameter on expiratory CT.Key Points: • PET cannot rule out malignancy in pulmonary nodules less than 12 mm on expiratory CT. • Melanoma patients with PET-negative pulmonary nodules less than 12 mm require additional tests. • Knowledge of these factors can help interpretation of PET and PET/CT findings. [ABSTRACT FROM AUTHOR]
Copyright of European Radiology is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Assessment of pulmonary melanoma metastases with 18F-FDG PET/CT: which PET-negative patients require additional tests for definitive staging?
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  Data: &lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Mayerhoefer+ME%22&quot;&gt;Mayerhoefer ME&lt;/searchLink&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Prosch+H%22&quot;&gt;Prosch H&lt;/searchLink&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Herold+CJ%22&quot;&gt;Herold CJ&lt;/searchLink&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Weber+M%22&quot;&gt;Weber M&lt;/searchLink&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Karanikas+G%22&quot;&gt;Karanikas G&lt;/searchLink&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Mayerhoefer%2C+Marius+E%22&quot;&gt;Mayerhoefer, Marius E&lt;/searchLink&gt;&lt;relatesTo&gt;1&lt;/relatesTo&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Prosch%2C+Helmut%22&quot;&gt;Prosch, Helmut&lt;/searchLink&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Herold%2C+Christian+J%22&quot;&gt;Herold, Christian J&lt;/searchLink&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Weber%2C+Michael%22&quot;&gt;Weber, Michael&lt;/searchLink&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Karanikas%2C+Georgios%22&quot;&gt;Karanikas, Georgios&lt;/searchLink&gt; (AUTHOR)
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  Data: &lt;searchLink fieldCode=&quot;JN&quot; term=&quot;%22European+Radiology%22&quot;&gt;European Radiology&lt;/searchLink&gt;. Nov2012, Vol. 22 Issue 11, p2451-2457. 7p.
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  Data: &lt;bold&gt;Objectives: &lt;/bold&gt;To determine, in patients with melanoma, the dependence of PET sensitivity on pulmonary metastasis size, and to determine patients who require further evaluation for definite staging.&lt;bold&gt;Methods: &lt;/bold&gt;Of 183 melanoma patients who underwent (18)F-fluorodeoxyglucose PET/computed tomography (CT) for staging or follow-up between January 2008 and June 2011, 38 patients (18 women and 20 men; mean age 62.0 &#177; 14.7&#160;years) with one or more pulmonary metastases visible on CT were included in the retrospective study. Each pulmonary metastasis was rated as positive or negative on PET, and lesion size (maximum transverse diameter) was assessed on CT. PET sensitivity was calculated according to the lesions&#39; size, in 2-mm steps.&lt;bold&gt;Results: &lt;/bold&gt;A total of 181 pulmonary metastases were analysed. PET sensitivity was 7.9&#160;% for lesions of 4-5&#160;mm; 33.3&#160;% for lesions of 6-7&#160;mm; 56.8&#160;% for lesions of 8-9&#160;mm; 63.6&#160;% for lesions of 10-11&#160;mm; 100&#160;% for lesions of 12-14&#160;mm; and 100&#160;% for lesions of at least 15&#160;mm. The differences in sensitivity between the size groups were significant (P &lt; 0.001) CONCLUSIONS: With current state-of-the-art PET/CT technology, additional tests are necessary for definitive staging of melanoma patients who have one or more PET-negative lung nodules less than 12&#160;mm in diameter on expiratory CT.&lt;bold&gt;Key Points: &lt;/bold&gt;• PET cannot rule out malignancy in pulmonary nodules less than 12&#160;mm on expiratory CT. • Melanoma patients with PET-negative pulmonary nodules less than 12&#160;mm require additional tests. • Knowledge of these factors can help interpretation of PET and PET/CT findings. [ABSTRACT FROM AUTHOR]
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  Data: &lt;i&gt;Copyright of European Radiology is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder&#39;s express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.&lt;/i&gt; (Copyright applies to all Abstracts.)
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