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KMID : 1039420200540010119
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Journal of Pathology and Translational Medicine
2020 Volume.54 No. 1 p.119 ~ p.122
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Morule-like features in pulmonary adenocarcinoma associated with epidermal growth factor receptor mutations: two case reports with targeted next-generation sequencing analysis
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Lee Yoo-Jin
Oh Ha-Rim
Kim Eo-Jin
Ahn Bo-Kyung
Lee Jeong-Hyeon
Lee Young-Seok
Chae Yang-Seok
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Abstract
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Morules, or morule-like features, can be identified in benign and malignant lesions in various organs. Morular features are unusual in pulmonary adenocarcinoma cases with only 26 cases reported to date. Here, we describe two cases of pulmonary adenocarcinoma with morule-like features in Korean women. One patient had a non-mucinous-type adenocarcinoma in situ and the other had an acinarpredominant adenocarcinoma with a micropapillary component. Both patients showed multiple intra-alveolar, nodular, whorled proliferative foci composed of atypical spindle cells with eosinophilic cytoplasm. Targeted next-generation sequencing was performed on DNA extracted from formalin-fixed paraffin-embedded samples of the tumors. Results showed unusual epidermal growth factor receptor (EGFR) mutations, which are associated with drug resistance to EGFR tyrosine kinase inhibitors, revealing the importance of identifying morule-like features in pulmonary adenocarcinoma and the need for additional study, since there are few reported cases.
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KEYWORD
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Morule-like features, Pulmonary adenocarcinoma, Next-generation sequencing, Epidermal growth factor receptor
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