There appears to be white mucous or white fat on the surface of the stool. It’s about one inch long 1/4 to 3/8 inch thick- irregular in shape. I have GERD and microscopic collagenous colitis. I had my gall bladder removed at age 27 and chronic pain from arthritis and polymyalgia rheumatica. I am 78 years old. Any ideas? I have had it for several months at least. I have been slowly losing weight (on purpose) from 223 a year ago to 184 today. Thank you. Betty Hanson