People with MS should probably be very cautious about undergoing any surgery. This abstract is discussing surgical correction of a spinal deformity but the remarks about the risks of that surgery for those with neuromuscular diseases like MS seemed important, and so I've added the emphasis.
From PubMed, July 30, 2016:
J Am Acad Orthop Surg. 2016 Jul 28.
Management of Spinal Deformity in Adult Patients With Neuromuscular Disease
Protopsaltis TS1, Boniello AJ, Schwab FJ.
Author information
1From the Department of Orthopaedic Surgery, NYU Langone Medical Center Hospital for Joint Diseases, New York, NY (Dr. Protopsaltis and Dr. Schwab), and the Department of Orthopaedic Surgery, Drexel University College of Medicine, Philadelphia, PA (Dr. Boniello).
A wide range of neuromuscular diseases, including Parkinson disease, cerebral palsy, multiple sclerosis, and myopathy, are associated with spinal deformities. The most common postural deformities include anterocollis, Pisa syndrome (pleurothotonus), scoliosis, and camptocormia. Nonsurgical management of spinal deformity in patients with neuromuscular disease centers on maximizing the medical management of the underlying neurodegenerative pathology before surgical intervention is contemplated. Surgical management can include decompression alone, or decompression and fusion with short or long fusion constructs.
Patients with neuromuscular disease are susceptible to postoperative medical complications, such as delirium, epidural hematomas, pulmonary emboli, and cardiac events. Compared with outcomes in the typical patient with spinal deformity, postoperative outcomes in patients with neuromuscular disease have higher rates of surgical complications, such as instrumentation failure, proximal junctional kyphosis, loss of correction, and the need for revision surgery, regardless of the magnitude of surgical treatment.