Almost 4 months ago I had double bypass heart surgery and they found a lymphoma on the back of my heart. The surgery healing is going fine and I have had 3 rounds of chemo. Treanda & Rituxan and a Neulasta short 24 hrs later. No side affects at all. I overdid it and had swelling in my ankles but took laxsis. This morning I found a strange substance in my stool. It is a milk white tissue like substance in rope form more than 6 inches long. It was in two pieces. I have searched the internet and nothing seems to match. I also called the dr ofc to see if they wanted to check it out. No call back yet. I am 61 yrs old. Never sick except occassional cold. I am getting anxious whether the dr ofc is going to call back today. Can you help me.