Canton tumor
1.Results In 145 of the 149(97.3%) cases with invasive NPC, and 2 of 4 cases with in situ NPC, EBV DNase gene was detected. However, in Sihui, Canton, a high risk county for NPC, only 2 of the 155 subjects with nasopharyngeal precancerous state was the gene positive, and none of the 47 cases examined in the out patient department of the Tumor Hospital with precancerous lesions in the nasopharynx was positive.
