Utility of Genomic Analysis in Differentiating Synchronous and Metachronous Lung Adenocarcinomas from Primary Adenocarcinomas with Intrapulmonary Metastasis 

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Utility of Genomic Analysis in Differentiating Synchronous and Metachronous Lung Adenocarcinomas from Primary Adenocarcinomas with Intrapulmonary Metastasis  Jad Saab, Hamid Zia, Susan Mathew, Michael Kluk, Navneet Narula, Helen Fernandes  Translational Oncology  Volume 10, Issue 3, Pages 442-449 (June 2017) DOI: 10.1016/j.tranon.2017.02.009 Copyright © 2017 The Authors Terms and Conditions

Figure 1 Approach used in studying patients presenting with multiple lung adenocarcinomas. Patients with a new diagnosis were divided into two categories: those whose tumors were present in the same lung lobe (Table 1) and those with tumors in different lobes (Table 2). Patients with a history of lung adenocarcinoma who were diagnosed with new multiple adenocarcinomas on follow-up were studied separately (Table 3). Translational Oncology 2017 10, 442-449DOI: (10.1016/j.tranon.2017.02.009) Copyright © 2017 The Authors Terms and Conditions

Figure 2 Paired tumors from three patients arising in the same lobe and showing distinct cytological and molecular features (A-B: Table 1, patient #2, C-D: Table 1, patient #3, E-F: Table 1, patient #5). Although both tumors showed combined acinar and lepidic growth, one tumor featured clear, vacuolated cytoplasm (A, 400×), whereas the other showed scant eosinophilic cytoplasm (B, 400×). This patient's tumors both showed a mixture of solid, micropapillary, and lepidic growth; however, one featured pleomorphic cells with granular and vacuolated cytoplasm (C, 400×), whereas the other had more uniform tumor cells with dense eosinophilic cytoplasm (D, 400×). In this patient, one tumor was acinar predominant with focal micropapillary areas (E, 400×), whereas the other was papillary predominant (F, 400×). Translational Oncology 2017 10, 442-449DOI: (10.1016/j.tranon.2017.02.009) Copyright © 2017 The Authors Terms and Conditions

Figure 3 Paired tumors from three patients arising in different lobes and showing distinct cytological and molecular features (A-B: Table 2, patient #1, C-D: Table 2, patient #3, E-F: Table 2, patient #6). One tumor shows a predominantly solid growth pattern with moderately atypical nuclei and abundant eosinophilic cytoplasm (A, 400×), whereas the second tumor exhibits an acinar growth pattern with hyperchromatic hobnailed nuclei (B, 400×). Although both tumors exhibit an acinar growth pattern, one has low-grade nuclei and a pauci-inflammatory stroma (C, 400×), whereas the other has pleomorphic nuclei and an inflamed stroma (D, 400×). Two tumors both featuring acinar and micropapillary growth; however, one tumor has columnar cells with abundant cytoplasm, apical snouts, and hobnailed nuclei (E, 400×), features not readily identified in the other tumor (F, 400×). Translational Oncology 2017 10, 442-449DOI: (10.1016/j.tranon.2017.02.009) Copyright © 2017 The Authors Terms and Conditions

Figure 4 A 72-year-old woman with a history of lung adenocarcinoma presenting with two left upper lobe tumors having similar growth patterns and cytologic features (Table 3, patient #7). One tumor showed KRAS G13D and GNAS Q227L mutations (A, 400×), whereas the second tumor had a KRAS G12C mutation (B, 400×). The tumors were classified as independent of one another and unrelated to the prior tumor. Translational Oncology 2017 10, 442-449DOI: (10.1016/j.tranon.2017.02.009) Copyright © 2017 The Authors Terms and Conditions