Hi Dave I have Undifferentiated Connective Tissue Disease (UCTD) I was told for six years it was SLE LUPUS but now they say it UCTD i have had so many tests with postive results i am overlapping a fair few auto imuine diseases, i don't know much about it but i have been having heaps of problems over the yrs, your wife needs to see a rheumatologist, hopefully the waiting list isn't to long we have a year waiting list here.
All treatments for MCTD are tough, but the condition is managable.
antiinflammatory drugs and immunosuppressants are both widely used. You need to get her into a rheumatologist.
I have had it for years, and am stable to where I take Methotrexate every 3 months