Question to the Department of Health and Social Care:

To ask the Secretary of State for Health and Social Care, what steps her Department is taking to improve the (a) diagnosis and (b) treatment of X-linked hypophosphatemia.

Genomic testing in the National Health Service in England for hypophosphataemia is currently included in the National Genomic Test Directory under the clinical indication labelled R154. X-linked hypophosphatemia is one of 200 treatable rare conditions being included in the Generation Study, a landmark research study which will sequence the whole genomes of 100,000 newborn babies being led by Genomics England in partnership with the NHS.

The study will evaluate the utility and feasibility of using whole genome sequencing to screen newborn babies for a larger number of childhood-onset rare genetic conditions in the NHS, with a decision whether this should be rolled out now or in the future based on the relevant evidence.

National Genomics Education has also developed GeNotes, which puts innovative educational resources on genomics and rare diseases at the fingertips of healthcare professionals. GeNotes includes information on hypophosphatemia to support healthcare professionals to identify and manage forms of hypophosphatemia such as X-linked hypophosphatemia.

Burosumab is now recommended and available on the NHS for treating X-linked hypophosphataemia in children and young people who are still growing. This novel treatment addresses the underlying problem, rather than compensating for phosphate loss, so is effective in helping children to grow normally.