Histological scoring for small lung adenocarcinomas 2 cm or less in diameter: a reliable prognostic indicator

Journal of Thoracic Oncology : Official Publication of the International Association for the Study of Lung Cancer
Akiko M MaeshimaHitoshi Tsuda

Abstract

Lung adenocarcinomas 2 cm or less in diameter were studied to develop histologic criteria predicting the outcome. We reviewed 510 consecutive lung adenocarcinomas 2 cm or less in diameter and assessed three histologic parameters to implement a histologic scoring system: lymphovascular invasion, maximum diameter of the nonbronchioloalveolar carcinoma (BAC) component, and percentage of the solid, cribriform, and/or papillary component in the entire tumor volume (%solid/cribriform/papillary). One point was given to each of lymphovascular invasion-positive, non-BAC >10 mm and %solid/cribriform/papillary > or =30%, and by the sum of these points, a score of 0 to 3 was assigned for each tumor. We also evaluated minimally invasive adenocarcinomas comprising non-BAC < or =5 mm, Sakurai grades 1 and 2. Five-year disease-free survival rates of 287 patients with a histologic score of 0, 69 with a score of 1, 64 with a score of 2, and 90 with a score of 3 were 98.9%, 92.4%, 78.4%, and 54.0%, respectively. The 510 tumors included 129 noninvasive and 127 minimally invasive adenocarcinomas. None of these tumors recurred. In remaining 254 patients with overtly invasive adenocarcinomas, 5-year disease-free survival rates in 51 with a histologic...Continue Reading

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Citations

Oct 2, 2012·European Journal of Cardio-thoracic Surgery : Official Journal of the European Association for Cardio-thoracic Surgery·Tatsuo MaeyashikiShiaki Oh
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