Sorry to hear this. Depending upon the actual prognosis and how long you have been in your IVA your creditors might consider accepting payments made to date as full and final settlement.
I would suggest a full and frank discussion with your IP direct.
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014
So sorry to read of your ill health ... as others have said your iva is not important right niw ..let your IP resolve with your creditors and hopefully they will agree to payments to date. Spend your time with those around you that love and care and try not to worry over this x
Sharing from experiences of dealing with debt
There is a solution for everyone .... Just need to stay positive !