My dad is suffering from Parkinson's disease. His symptoms have worsened in the past year. He suffers diarrhea immediately after eating, and continues to loose weight. He had a recent ct scan that showed rectal thickness. My mother was going to inquire if it was more than 3 mm or irregular. His Parkinson's symptoms have worsened. His gait, walking and speach. He's been on dopamine for some time and I don't know if this problem started before or after the medication was introduced. I don't think he is physically able to do the prep needed for a colonoscopy. He has spine disease and suffers great pain daily. Cortisone shots (5) recently hurt him badly and gave him no relief. He is unable to take narcotics. They confuse him even more and has had a very bad reaction from them. He actually went into the hospital about 5-6years ago to detox from them. I'm afraid my dad is going to die from malnutrition!!! Is it a complication from Parkinson's disease or is it something else. The ct was preformed to rule out cancer. Our only answer was rectal thickening. I will question my mother to see if the diarrhea started with the introduction of the meds. And ask her if the thickness was more than 3mm or irregular. Thank you for your reply