PTEN and cervical carcinoma: 65 According to the Catalogue of Somatic Mutations in Cancer (COSMIC) data set, approximately 30% of PTEN alterations in cervical cancer patients are related to gene under expression.66 Loures and co-authors demonstrated that PTEN expression intensity was lower in SCC patients compared to control patients (benign cervix) and was not associated with tumour expression of p53.67