Cytopathology of pulmonary adenocarcinoma with a single histological pattern using the proposed International Association for the Study of Lung Cancer/American Thoracic Society/European Respiratory Society (IASLC/ATS/ERS) classification

Cancer Cytopathology
Erika F RodriguezSara E Monaco

Abstract

Guidelines for histological subtyping in patients with surgically resected lung adenocarcinoma (ADC) were recently proposed by the International Association for the Study of Lung Cancer/American Thoracic Society/European Respiratory Society. The objective of the current study was to investigate the cytomorphology of these subtypes of ADC in cases with matched histology specimens demonstrating a single pure subtype. The authors reviewed their database for patients with histological diagnoses of primary lung ADC with a single histological pattern observed on surgical resection and investigated the cytological findings in 18 matched cytology specimens to eliminate sampling issues in cases of mixed ADC. Resections were classified as acinar (7 specimens), solid (6 specimens), lepidic (2 specimens), mucinous (2 specimens), and papillary (1 specimen). Cytology specimens demonstrating a solid pattern had a predominance of 3-dimensional clusters (5 of 6 vs 0 of 12 specimens) (P = .0007, Fisher exact test), necrotic background (3 of 6 vs 0 of 12 specimens) (P = .02), pleomorphic nuclei (6 of 6 vs 1 of 12 specimens) (P = .0004), irregular nuclear contours (6 of 6 vs 3 of 12 specimens) (P = .009), and nuclear enlargement (5 of 6 vs 2 of 12...Continue Reading

References

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Citations

Aug 28, 2015·Expert Review of Respiratory Medicine·Anna TruiniGiulio Rossi
Feb 2, 2018·Cytopathology : Official Journal of the British Society for Clinical Cytology·A NambirajanD Jain
Feb 12, 2019·Diagnostic Cytopathology·Ryota TanakaHaruhiko Kondo
Dec 3, 2016·European Respiratory Review : an Official Journal of the European Respiratory Society·Alain C Borczuk

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