腺样囊性癌(adenoid cystic carcinoma),又称圆柱瘤(cylindroma)或圆柱瘤型腺癌(adeno-carcinoma of cylindroma type),由Billroth首次报道,是居头颈部第二位的涎腺恶性肿瘤,好发于小涎腺及大涎腺中较小腺体。本院去年收治了1例不明原因胸腔积液的患者,经肺部CT、胸腔穿刺及内科胸腔镜等检查最终确诊为胸膜腺样囊性癌,因以往文献报道很少有以胸腔积液为首发症状的腺样囊性癌病例,故将本例 Adenoid cystic carcinoma, also known as cylindroma or adeno-carcinoma of cylindroma type, was first reported by Billroth as the second most common malignancy of salivary glands in the head and neck, Tumors, occur in the lesser salivary glands and small salivary glands. Last year, our hospital admitted to a patient with unexplained pleural effusion, lung CT, thoracentesis and medical thoracoscopy and other tests eventually diagnosed as pleural adenoid cystic carcinoma, as previously reported in the literature rarely pleural effusion Symptoms of adenoid cystic carcinoma, so this case