The family of a teenage boy who died after being diagnosed with motor neurone disease (MND) has warned the rare, degenerative condition can hit "anybody at any age, at any time". Kyle Sieniawski, 14, from Pontypridd, Rhondda Cynon Taf, died on 27 November, after being diagnosed less than a year ago with MND. The disease typically affects people aged over 50, and Kyle is believed to be the youngest person to have died with MND in the UK.