Information about neurological symptoms relating to PPID has been added to the website. Ataxia (weakness/inconsistent gait), blindness, seizures and narcolepsy have been associated with advanced PPID. Blindness has been suggested as being caused by adenomas (tumours) in the pituitary gland compressing the optic nerves, but there doesn't appear to be a known connection between other neurological symptoms and PPID. TLS queries whether direct trauma to the head/brain could play a part in both PPID and these rare neurological symptoms.