lak3909, as I said before - it all depends on your circumstances and the evidence you can provide to support your application. It goes without saying though that your absences are quite high (350+) and so may not be an easy task. And in my personal opinion cultural factors are not something one can definitely count on when it comes to UKBA.
Examples of some questions that you may have to provide answers for (incl. documentary evidences perhaps):
Why couldn't you continue treatment in the UK? Do you have a letter from UK consultant that states that treatment in UK was either not possible or not immediately / quickly available or accessible? Was stay in home country mandatory when being treated there (home country)? Will the doctor certify the need for prolonged treatment and stay in home country?
Reading
this topic will be useful.
regards