Background: Comparatively little has been published on the clinical features and management of severe forms of ME/CFS.
Objectives: To describe the presenting symptoms and neurological examination findings in three young adult women whose disabling ME/CFS symptoms and orthostatic intolerance improved after the recognition and surgical management of cervical spine stenosis (CSS).
Methods: This retrospective case series includes three consecutive individuals who (1) met the Fukuda and criteria for CFS, (2) had evidence of refractory orthostatic intolerance, (3) were unable to work or attend school, and (4) were minimally responsive to medical and psychiatric management. To investigate pathological reflex findings, all underwent MRI evaluations. CSS was considered present if the AP cervical spinal canal diameter (SCD) was less than 10 mm at any level. Overall function was assessed before and after cervical disc replacement surgery using (1) a clinician-assigned Karnofsky score (range 0 to 100) and (2) the SF-36 physical function (PF) subscale score (range 10-30). Higher scores indicate better function on both measures.
Results: Age at onset of symptoms was 12, 29, and 29 years. The onset of ME/CFS was acute in all three. Neurological exam findings included > 3+ (brisk) deep tendon reflexes (DTR) in 2/3, positive Hoffman sign in 2/3, tremor in 2/3, and absent gag reflex in 1/3. Diagnosis was delayed for 6-9 years after the onset of symptoms. Brain MRIs were normal. The youngest patient had congenital CSS with a single level disc protrusion at C5-6 that caused further ventral cord compression and a SCD of 7 mm. Her mother also has cervical stenosis. A second
patient had two disc protrusions at C5-6 and C6-7 with SCD of 7 and 9 mm, and myelomalacia (this patient has a sibling with Chiari I malformation). The third had acquired CSS due to a single level disc bulge at C5-6 (SCD = 8.5 mm).
Improvements were evident within 2 months of single-level cervical disc replacement surgery (one patient also had fusion at an adjacent level). After 16-40 months of follow-up, all reported improved fatigue, cognitive dysfunction, PEM, lightheadedness, and anxiety. The pre- to post-op SF-36 PF scores improved from 13 to 30, 18 to 30, and 16 to 26, respectively, and the Karnofsky scores improved from 40 to 90, 40 to 90, and 50 to 100, respectively. Standing tests conducted at variable intervals from pre- to post-op showed a reduction in the maximal heart rate (HR) change during 5 minutes of standing from 64 to 22 bpm, 42 to 29 bpm, and 34 to 27 bpm, respectively.
Conclusion: This case series draws attention to the potential for CSS to contribute to ME/CFS and orthostatic symptoms, extending work by Heffez in fibromyalgia (Eur Spine J 2004;13:516). Further work is needed to define indications for surgery. However, the improvements in HR and function following surgery emphasize the importance of detecting and treating CSS, especially in the subset of those with ME/CFS whose severe symptoms are refractory to other interventions.
Peter C. Rowe, M.D.
Professor of Pediatrics
Johns Hopkins University School of Medicine/200 N. Wolfe Street/Room 2077
Baltimore, MD 21287
prowe@jhmi.edu
Dr. Rowe is supported by the Sunshine Natural Wellbeing Foundation Professorship in Chronic Fatigue and Related Disorders. No author has a conflict of interest.
Source: Peter C. Rowe, M.D*, Colleen L. Marden, Scott Heinlein, PT, Charles Edwards II, M.D. Cervical spine stenosis as a cause of severe ME/CFS and orthostatic intolerance symptoms. Poster presentation, IACFS/ME 2016 conference.