Employing the same technique, expression levels of survivin (inhibitor of apoptosis), BCL-2 and KAI 1 (tumour metastases suppressor protein) were investigated in normal cervix, chronic cervicitis, cervical intraepithelial neoplasia (CIN) and cervical cancer. The gene discussed is BIRC5; the disease is cervical squamous intraepithelial neoplasia.