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    • PET/CT may predict...

    PET/CT may predict subtypes and growth patterns in lung adenocarcinoma

    Written by Hina Zahid Published On 2019-12-17T19:20:08+05:30  |  Updated On 23 Aug 2021 5:36 PM IST

    Leesburg, VA --Researchers conducted a study was to explore the value of FDG PET combined with high-resolution CT (HRCT) in predicting the pathologic subtypes and growth patterns of early lung adenocarcinoma. They have found that Fluorodeoxyglucose PET (FDG PET) combined with high-resolution CT can be used to predict the histopathologic subtypes and growth patterns of early lung adenocarcinoma.


    The article is going to be published in the February 2020 issue of the American Journal of Roentgenology (AJR).


    "FDG PET, combined with high-resolution CT (HRCT), has value for predicting invasive histopathologic subtypes, but there was no significance for predicting invasive growth patterns," clarified lead author Xiaoliang Shao from the department of nuclear medicine at Soochow University in Changzhou, China.


    Shao and colleagues' retrospective analysis was conducted on the PET/CT data on ground-glass nodules (GGNs) resected from patients with stage IA lung adenocarcinoma, evaluating the efficacy of PET maximum standardized uptake value (SUVmax) combined with HRCT signs in the prediction of histopathologic subtype and growth pattern of lung adenocarcinoma.


    Although SUVmax measured significantly higher in GGNs with invasive HRCT signs, the diameter of GGN, as well as the attenuation value differential between ground-glass components and adjacent lung tissues, were independent predictors of FDG uptake by GGNs.


    Additionally, SUVmax was higher in invasive adenocarcinoma than in adenocarcinoma in situ (AIS)-minimally invasive adenocarcinoma (MIA), with SUVmax 2.0 the optimal cutoff value for differentiation.


    Acinar-papillary adenocarcinoma had a higher SUVmax than lepidic adenocarcinoma, with SUVmax 1.4 the optimal cutoff value for differentiation.


    "In stage IA lung adenocarcinoma characterized by GGNs, the SUVmax of GGNs with invasive CT features was high," Shao wrote, adding that HRCT can be used in diagnosing the subtypes of lung adenocarcinoma.


    "However, it cannot be used to differentiate different growth patterns of lung adenocarcinomas."


    As Shao concluded: "The efficacy of FDG PET SUVmax in differentiating lung adenocarcinoma subtypes is similar to that of HRCT signs, however, the diagnostic efficiency of FDG PET combined with HRCT is significantly higher than that of each imaging technique alone."


    For more details click on the link: https://dx.doi.org/10.2214/AJR.19.21585
    American Journal of roentgenologyfluorodeoxyglucoseground-glass opacity noduleshigh-resolution CThistopathologic subtypelung adenocarcinomaPETXiaoliang Shao
    Source : American Journal of Roentgenology

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    Hina Zahid
    Hina Zahid
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