I've encountered few cases wherein we deployed few staff who were medically fit from their country of origin but failed the medical here because of the SCAR issue (same thing that the illness has been totally cured years back). They were sent for remedical but after the same result, were right away repatriated without further questions. However, since your wife would be under husband/family visa not for WORK VISA, I am not quite sure if the same rule applies. Better check with the right authorities for certainty.