4th April 2024

An 8-year-old boy presents with his mother to his GP complaining of several months of worsening muscle cramps, as well as perioral numbness and tingling.

An 8-year-old boy presents with his mother to his GP complaining of several months of worsening muscle cramps, as well as perioral numbness and tingling. He is on the 5th centile for height and 98th centile for weight. He is known to have developmental delay.  On examination, you note short fourth and fifth metacarpals bilaterally.  Given the likely diagnosis, what is the mode of inheritance?

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