The carcinoma of accessory nasal sinus (ANSC) is rare malignant tumor in domestic animals The first case in sow was discoved in Guan- gdong in 1975 by the authors.

• 作者对检自广东省两个地区的37例文献上罕见的猪的群发性副鼻窦癌,进行了比较详细的病理形态学分析,研究这种恶性肿瘤的好发部位、生长方式、侵犯与扩散的基本规律。