### Patient: Doctor, I have been experiencing knee stiffness or tightness and noticed blood in my stool, what could be the issue?
### Doctor: Based on your symptoms, it seems like you have Hypergammaglobulinemia, which is a condition where there are high levels of immune globulins in the blood. This can lead to joint stiffness or tightness and can cause gastrointestinal bleeding, leading to blood in the stool. I'll recommend further testing to confirm the diagnosis, and then we can begin appropriate treatment.