Medical set backs are rare but not unheard of. If your M/N or PC's medical issue cannot be resolved without impacting his or her ability to participate in all aspects of academy life for an extended period of time, they may be sent home for medical reasons. I know of 2 mids during my mids plebe year that had knee surgery and tonsil surgery that came back after a week and were able to carry on in their academy duties. There have been other instances where an issue hasn't been resolved so quickly and the M/N was sent home to return the following year. Assuming your DD/DS is a PC, find out if they will make them go through INDOC all over again. Whatever you decide, if they come home, send them to the local community college if you can. Have them take Calc, physics etc so when they return these classes will be easy and have them work out and stay in shape- really important. Most of all have them get better!