Histology of the tumor revealed necrosis of salivary glands, squamous metaplasia of salivary ducts and acini with bland appearance of the squamous cells which showed occasional nuclear atypia.

• 病理特徵为：唾腺坏死、唾腺管与腺泡的鳞状化生、其鳞状细胞外观平淡无奇，但偶可见异常细胞核。