Method for discrimination of metaplasias from neoplastic or preneoplastic lesions
The present invention relates to a method for discrimination of p16 INK4a overexpressing metaplasias from neoplastic or preneoplastic p16 INK4a overexpressing lesions by determination of the level of high risk HPV encoded gene-products such as e.g. HPV E2 and/or HPV E7 molecules in biological samples in the course of cytological testing procedures. The method thus enables for reduction of false positive results in the p16 INK4a based detection of anogenital lesions in cytological testing procedures.
1. A method for discrimination of p16 INK4a overexpressing metaplasias from p16 INK4a overexpressing neoplastic or dysplastic lesions in a uterine cervical sample in the course of cytological testing procedures comprising:
(a) determining the presence or absence of cell overexpression of p16 INK4a in said sample;
(b) determining the presence or absence of cells expressing at least one high risk HPV gene-product in said sample;
(c) assessing simultaneous presence of cells expressing high risk HPV gene-products with cells overexpressing p16 INK4a or the presence of cells overexpressing p16 INK4a alone;
(d) categorizing neoplastic or dysplastic lesion from the assessment in step (c) of the simultaneous presence of cells expressing high risk HPV gene-products with cells overexpressing p16 INK4a ; and
(e) categorizing lesions assessed in step (c) that overexpress p16 INK4a alone as not being uterine cervical neoplastic lesions and not being uterine cervical dysplastic lesions.