<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, Im experiencing leg weakness, abnormal involuntary movements, and have developed a lump on my foot. Also, my skin is looking abnormal, and I have a mass on my neck. What do you think could be the problem?  <response>: Based on your symptoms, its not uncommon for those with neurofibromatosis to experience leg weakness and involuntary movements. The lumps on your foot and neck are also common symptoms, along with abnormal appearing skin. I suggest we start running some tests to confirm if this is indeed neurofibromatosis. 