多原发癌的发生率很低 ,而同期同肺双原发癌更为少见。本院收治 2例 ,现报告如下。例 1　女 ,5 1岁。因刺激性阵发性干咳 2 0天入院。胸部Ｘ线片示右肺门可见一约 2 .0ｃｍ× 3 .0ｃｍ高密度块影 ,边缘不清 ,侧位见块影位于中叶。纤维支气管镜检诊断 :右肺中叶中心型肺鳞癌。行 The incidence of multiple primary cancers is very low, while the same primary lung cancer is more rare in the same period. Two cases were admitted to this hospital. The report is as follows. Example 1 Female, 51 years old. Due to irritable paroxysmal dry cough 20 days admission. Chest X-ray films showed a high-density block of about 2.0 cm x 3.0 cm in the right hilar, with unclear edges and lateral shadows in the middle lobe. Fiberoptic bronchoscopy diagnosis: Central lung right lobular lung squamous cell carcinoma. Row