<abstract xmlns="http://www.w3.org/1999/xhtml"><sec id="j_raon-2020-0034_s_005_w2aab3b7c36b1b6b1aab1c16b1Aa"><h3>Background</h3><p>According to the current pathological classification, lung adenocarcinoma includes histological subtypes with significantly different prognoses, which may require specific surgical approaches. The aim of the study was to assess the role of CT and PET parameters in stratifying patients with stage I adenocarcinoma according to prognosis.</p></sec><sec id="j_raon-2020-0034_s_006_w2aab3b7c36b1b6b1aab1c16b2Aa"><h3>Patients and methods</h3><p>Fifty-eight patients with pathological stage I lung adenocarcinoma who underwent surgical treatment were retrospectively reviewed. Adenocarcinoma <italic>in situ</italic> and minimally-invasive adenocarcinoma were grouped as non-invasive adenocarcinoma. Other histotypes were referred as invasive adenocarcinoma. CT scan assessed parameters were: ground glass opacity (GGO) ratio, tumour disappearance rate (TDR) and consolidation diameter. The prognostic role of the following PET parameters was also assessed: standardized uptake value (SUV) max, SUVindex (SUVmax to liver SUVratio), metabolic tumour volume (MTV), total lesion glycolysis (TLG).</p></sec><sec id="j_raon-2020-0034_s_007_w2aab3b7c36b1b6b1aab1c16b3Aa"><h3>Results</h3><p>Seven patients had a non-invasive adenocarcinoma and 51 an invasive adenocarcinoma. Five-year disease-free survival (DFS) and cancer-specific survival (CSS) for non-invasive and invasive adenocarcinoma were 100% and 100%, 70% and 91%, respectively. Univariate analysis showed a significant difference in SUVmax, SUVindex, GGO ratio and TDR ratio values between non-invasive and invasive adenocarcinoma groups. Optimal SUVmax, SUVindex, GGO ratio and TDR cut-off ratios to predict invasive tumours were 2.6, 0.9, 40% and 56%, respectively. TLG, SUVmax, SUVindex significantly correlated with cancer specific survival.</p></sec><sec id="j_raon-2020-0034_s_008_w2aab3b7c36b1b6b1aab1c16b4Aa"><h3>Conclusions</h3><p>CT and PET scan parameters may differentiate between non-invasive and invasive stage I adenocarcinomas. If these data are confirmed in larger series, surgical strategy may be selected on the basis of preoperative imaging.</p></sec></abstract>

BackgroundAccording to the current pathological classification, lung adenocarcinoma includes histological subtypes with significantly different prognoses, which may require specific surgical approaches. The aim of the study was to assess the role of CT and PET parameters in stratifying patients with stage I adenocarcinoma according to prognosis.Patients and methodsFifty-eight patients with pathological stage I lung adenocarcinoma who underwent surgical treatment were retrospectively reviewed. Adenocarcinoma in situ and minimally-invasive adenocarcinoma were grouped as non-invasive adenocarcinoma. Other histotypes were referred as invasive adenocarcinoma. CT scan assessed parameters were: ground glass opacity (GGO) ratio, tumour disappearance rate (TDR) and consolidation diameter. The prognostic role of the following PET parameters was also assessed: standardized uptake value (SUV) max, SUVindex (SUVmax to liver SUVratio), metabolic tumour volume (MTV), total lesion glycolysis (TLG).ResultsSeven patients had a non-invasive adenocarcinoma and 51 an invasive adenocarcinoma. Five-year disease-free survival (DFS) and cancer-specific survival (CSS) for non-invasive and invasive adenocarcinoma were 100% and 100%, 70% and 91%, respectively. Univariate analysis showed a significant difference in SUVmax, SUVindex, GGO ratio and TDR ratio values between non-invasive and invasive adenocarcinoma groups. Optimal SUVmax, SUVindex, GGO ratio and TDR cut-off ratios to predict invasive tumours were 2.6, 0.9, 40% and 56%, respectively. TLG, SUVmax, SUVindex significantly correlated with cancer specific survival.ConclusionsCT and PET scan parameters may differentiate between non-invasive and invasive stage I adenocarcinomas. If these data are confirmed in larger series, surgical strategy may be selected on the basis of preoperative imaging.

Prognostic role of positron emission tomography and computed tomography parameters in stage I lung adenocarcinoma

Radiology and Oncology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

BackgroundAccording to the current pathological classification, lung adenocarcinoma includes histological subtypes with significantly different prognoses,...

Prognostic role of positron emission tomography and computed tomography parameters in stage I lung adenocarcinoma

Article Category: Research Article

Pubblicato online: 28 mag 2020

Pagine: 278 - 284

Ricevuto: 04 feb 2020

Accettato: 04 mag 2020

DOI: https://doi.org/10.2478/raon-2020-0034

© 2020 Angelo Carretta, Alessandro Bandiera, Piergiorgio Muriana, Stefano Viscardi, Paola Ciriaco, Ana Maria Samanes Gajate, Gianluigi Arrigoni, Chiara Lazzari, Vanesa Gregorc, Giampiero Negri, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.