1st April 2022

A 30-year-old lady presents to the paediatric clinic with her 8-month-old child

A 30-year-old lady presents to the paediatric clinic with her 8-month-old child complaining of very frequent wet nappies and very dilute water-like urine. This has been progressing ever since the child was born; she has also noticed that her son cries more often from thirst than his elder sister did at a similar age. What gene-mutation is most likely to be seen in this child? 

Select the SINGLE most appropriate option from the list below. Select ONE option only.