支气管腺癌(Adenocarcinoma)属于原发性肺部低度恶性肿瘤。其患病率低，只占所有肺癌类型的2%左右。支气管腺瘤的确诊年龄较支气管癌早，症状随肿瘤生长部位和支气管腔有否阻塞，局部浸润和远处转移而异。支气管腺癌多发生于较大的支气管，生长缓慢，多见于年轻女性，常见临床症状为刺激性咳嗽、咳血，肿瘤常阻塞较大的支气管引起阻塞性肺不张和阻塞性肺炎。
此外，发现支气管腺癌、甲状腺嗜酸性腺瘤、甲状腺髓样癌和胆管细胞癌S-100蛋白阳性。
Especially, we have demonstrated S-100 protein in eosinophilic adenoma and medullary carcinoma of thyroid gland, adenocarcinoma of bile duct and bronchiolar adenocarcinoma.
结论空气支气管征可见于多种结节性肺病变，它似乎不是外周型小肺癌尤其腺癌的特征。
Conclusion Air bronchogram can be seen in several pulmonary nodules, it does not appear to be the characteristic of small peripheral carcinoma especially adenocarcinoma.
支气管镜检查取左上叶病灶活检显示为低分化腺癌。
He is seen by a pulmonologist who undertakes bronchoscopy. A biopsy of the left upper lobe lesion reveals poorly differentiated adenocarcinoma.
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