The Dane was due to share MDK Motorsport’s Porsche 911 GT3 R with father Jan Magnussen, Mark Kvamme and Trenton Estep in the opening round of the IMSA WeatherTech SportsCar Championship on 28-29 January.
Magnussen revealed he was suffering with a sore wrist before doctors diagnosed a cyst which needs to be removed prior to the F1 season, which starts in Bahrain on 3-5 March.
