Conversation: The conversation between human and AI assistant.
[|Human|] hi. What could having a black mark on your kidney mean. Doctors have recently found a mark on my dads kidneys. He is 50 years old and has a past of drinking and smoking. He stopped drinking a few years ago and smoking about 2 years. My dad says the doctors havnt made a diagnosis yet but i think he may be hiding something.
[|AI|]  Hi, Not every dark mark on kidney is something bad to worry about. I guess you are afraid about cancer, but the diagnosis of cancer cannot be done only by ultrasound. It requires firstly urine and blood laboratory analysis, then some test for enzymes etc. I do understand your concern, and I am not excluding anything, but for sure that you have to wait for some more analysis to make the right diagnose. Please feel free to recontact me. Hope I have answered your query. Let me know if I can assist you further. All the best,