It would be from "complications of" more than the disease itself.
There's a lot to say for having things controlled.
CD is a disease that goes deeper and can affect the entire depth of the intestinal walls...and it can show up anywhere from mouth to anus...to controling it and dealing with possible fistulas, infections, blockages, etc would be necessary.
With UC, as possibly with CD, there are extraintestinal disease linked....but as with everything, the key is to have things dealt with at early stages.
Medications can cause side effects that can affect organs....so, that wouldn't be directly from the disease itself.
I wouldn't worry....focus more on feeling good and recognising symptoms at early stages and deal with them quickly.
*Heather* Status: mild flare enemas tapered to every 3rd night
~diagnosed January 1989 UC (proctosigmoiditis)
~UC meds: Asacol (3 x2 daily); Salofalk enemas nightly for flares & taper to maintenance
~Bentylol (dicyclomine) 20mg as needed; Ranitidine (reflux); Effexor XR 75mg(depression); Pulmicort/Airomir (asthma)
~vitamins/minerals/supplements; Probiotics....(Natural Factors Protec, Primadophilus Reuteri Pearls). @ bedtime
~various digestive enzymes as needed
~URSO for PSC (or PBC) 500mg X 2 daily (LFTs back to NORMAL!!)
My doc's logic.. "TREAT (FROM)BOTH ENDS" worth it !!!