<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been experiencing low back weakness and sore throat. What could be the problem?  <response>: Based on your symptoms, it is possible that you have Zenker diverticulum. It is a condition where there is an outpouching in the throat, which can cause difficulty with swallowing and lead to other symptoms such as sore throat and occasionally low back weakness. 