Molecular Pathology of Human Papilloma Virus-Negative Cervical Cancers

SIMPLE SUMMARY: Although cervical cancer is mainly caused by infection with human papillomavirus (HPV), some cervical cancers test negative for HPV. As these HPV-negative cervical cancers are often diagnosed at an advanced stage and have a poor prognosis, it is important to understand their molecular pathology. Here, we provide an overview of the potential causes of false-negative HPV tests, as well as the histology, genetic profile, and pathogenesis of HPV-negative cancers. ABSTRACT: Cervical cancer is the fourth most common cancer in women worldwide and is predominantly caused by infection with human papillomavirus (HPV). However, a small subset of cervical cancers tests negative for HPV, including true HPV-independent cancers and false-negative cases. True HPV-negative cancers appear to be more prevalent in certain pathological adenocarcinoma subtypes, such as gastric- and clear-cell-type adenocarcinomas. Moreover, HPV-negative cervical cancers have proven to be a biologically distinct tumor subset that follows a different pathogenetic pathway to HPV-associated cervical cancers. HPV-negative cervical cancers are often diagnosed at an advanced stage with a poor prognosis and are expected to persist in the post-HPV vaccination era; therefore, it is important to understand HPV-negative cancers. In this review, we provide a concise overview of the molecular pathology of HPV-negative cervical cancers, with a focus on their definitions, the potential causes of false-negative HPV tests, and the histology, genetic profiles, and pathogenesis of HPV-negative cancers.