Did a little homework for you..hope it helps.
Distal sigmoid...lowest part of the sigmoid
Distal colitis...lowest part of the colon which would include the rectum/sigmoid
Tubular appearance....smooth and round or tubular without lots of "structure"
Bland ... without symptoms or asymptomatic
Decreased vascular pattern ... normal vascular pattern isn't visible
Burned out (Burnt out)... distensible (can stretch and expand) but without haustral markings...meaning without the pouchy appearance ( ) looks more like more like|| ...chronic/advanced/been around for a long while