Multizonal anogenital intraepithelial neoplasia (MZIN) is an uncommon chronic pre-malignant condition. In the United Kingdom (UK) and elsewhere MZIN is managed by a variety of clinical specialities with differing strategies, resulting in a lack of standardisation in diagnosis and treatment which ultimately disadvantages those affected. Screening for anogenital precancerous
conditions is sporadic rather than nationalised in the UK and elsewhere in Europe, with the exception of the cervix. To address this lack of standardisation, the BSCCP brought together a panel of stakeholders from aligned expert society committees (IANS, EFC and
BSVVD) to review existing evidence and provide a framework for national UK guidelines. Here, we de
fine terminology and scope, as a platform for subsequent guideline development and guide further research. We define MZIN as Human Papilloma Virus (HPV)-related squamous intraepithelial lesions occurring in two or more anogenital regions. People with MZIN are a high-risk group for anogenital cancers and subsequently may require tailored monitoring in specialist multi-disciplinary clinics. Centralisation of care
and education for primary care providers may improve management. The development of guidelines which incorporate all clinical stakeholders are now needed to provide an international framework regarding the screening, diagnosis, treatment and future prevention of MZIN.