How long ago was the treatment, how old is the patient and what type of physical rehab did they do and for how long after or before the proceedure? Was this due to accident or injury?
Nerve regen can take up to a year - sometimes longer and sometimes not at all. Have you talked with their Dr. to find out if he is cleared for massage and what type?
Laughter is the best medicine :) It's good for the soul and great for the abs!