Tumor spread through air spaces in lung cancer: prospective analysis of the accuracy of intraoperative frozen section examination

被引:0
|
作者
de Almeida, Germano Luciano [1 ]
Pinto, Bruno Maineri [1 ]
Pinto, Vitor Maineri [1 ]
Tregnago, Aline Caldart [1 ]
Almeida, Renata Fragomeni [1 ]
Pinto Filho, Darcy Ribeiro [1 ]
机构
[1] Univ Caxias Do Sul, Hosp Geral Caxias Do Sul, Caxias Do Sul, RS, Brazil
关键词
Neoplasm invasiveness; Frozen sections; Lung neoplasms/pathology; Lung neoplasms/surgery; STAS; RECURRENCE; IMPACT; RESECTION; PATTERN;
D O I
10.36416/1806-3756/e20240165
中图分类号
R56 [呼吸系及胸部疾病];
学科分类号
摘要
Objective: To establish the accuracy of frozen section examination in identifying tumor spread through air spaces (STAS), as well as to propose a reproducible technical methodology for frozen section analysis. We also aim to propose a method to be incorporated into the decision making about the need for conversion to lobectomy during sublobar resection. Methods: This was a nonrandomized prospective study of 38 patients with lung cancer who underwent surgical resection. The findings regarding STAS in the frozen section were compared with the definitive histopathological study of paraffin-embedded sections. We calculated a confusion matrix to obtain the positive predictive value (PPV), negative predictive value (NPV), sensitivity, specificity and accuracy. Results: The intraoperative frozen section analysis identified 7 STAS-positive cases that were also positive in the histopathological examination, as well as 3 STAS-negative cases that were positive in the in the histopathological examination. Therefore, frozen section analysis was determined to have a sensitivity of 70%, specificity of 100%, PPV of 100%, NPV of 90.3%, and accuracy of 92% for identifying STAS. Conclusions: Frozen section analysis is capable of identifying STAS during resection in patients with lung cancer. The PPV, NPV, sensitivity, and specificity showed that the technique proposed could be incorporated at other centers and would allow advances directly linked to prognosis. In addition, given the high accuracy of the technique, it could inform intraoperative decisions regarding sublobar versus lobar resection.
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页数:7
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