Fetal adenocarcinoma of the lung (FLAC) is an extremely rare subtype of lung cancer, accounting for only 0.1% to 0.5% of primary pulmonary malignancy. In 2011, international multidisciplinary classification of lung adenocarcinoma developed by the International Association for the Study of Lung Cancer (IALSC), the American Thoracic Society (ATS) and the European Respiratory Society (ERS) classified FLAC as a variant of invasive adenocarcinoma. FLAC has been further divided into low-grade fetal adenocarcinoma (L-FLAC) and high-grade fetal adenocarcinoma (H-FLAC) as these two categories exhibit different clinicopathological features and biological behaviors. Here we report a case of high-grade fetal adenocarcinoma and summarize clinicopathologic features of fetal lung adenocarcinoma. .
【中文题目：高级别胎儿型肺腺癌1例】 【中文摘要：胎儿型肺腺癌属极其罕见的肺恶性肿瘤，2011年由国际肺癌研究协会、美国胸科学会和欧洲呼吸学会共同制定的国际多学科肺腺癌新分类将胎儿型肺腺癌归为浸润性腺癌的变异型，并将其分为低级别、高级别两类，二者临床病理特点和生物学行为不尽相同。本文报道高级别胎儿型肺腺癌1例，并结合文献总结胎儿型肺腺癌的临床病理特点。 】 【中文关键词：肺肿瘤；胎儿型腺癌；预后】.
Keywords: Fetal adenocarcinoma; Lung neoplasms; Prognosis.