Scant Evidence
An early literature search revealed very little evidence on PNS manifestations in patients with Sjögren disease, so the guideline committee “leaned very heavily on expert opinion” to develop recommendations, Kathy Hammitt, MA, vice president of Medical and Scientific Affairs, Sjögren’s Foundation, told this news organization.
The literature search also showed different terms are used to describe PNS, “which is where the chaos comes in,” said Dr. Sarka.
Experts from different specialties worked together to define and align nomenclature used by various specialists. They developed definitions for seven PNS categories including mononeuropathy, large fiber neuropathy, small fiber neuropathy, demyelinating polyradiculoneuropathy, ganglionopathy, vasculitis neuropathy, and autoimmune nervous system neuropathy.
The guidelines pertaining to PNS manifestations encompass a spectrum of neurologic abnormalities, including cranial neuropathies (trigeminal neuropathy or acute facial neuropathy), polyneuropathies (large fiber neuropathy, small fiber neuropathy, demyelinating polyradiculoneuropathy, vasculitis neuropathy, or ganglionopathy), and autonomic nervous system (ANS) neuropathies (postural tachycardia, orthostatic hypotension, or autonomic dysfunction).
Key Steps
The guidelines address two key steps for each PNS manifestation — the workup and evaluation of patients with suspected ANS manifestation including standard evaluations, diagnostic tests, and treatment. The experts developed 31 best practices for diagnosis and workup and 20 treatment recommendations.
Initial assessment of potential ANS involvement includes asking patients about orthostatic postural lightheadedness and difficulties with digestion, urination, sweating, and sexual function.
Treatment of autoimmune diseases typically focuses on relieving symptoms and can include steroids, the anticonvulsant gabapentin, the monoclonal antibody rituximab, and intravenous immunoglobulin. “The type of neuropathy will mandate or suggest certain therapies over others,” said Dr. Sarka, adding that a patient can have more than one neuropathy.
Therapeutics for Sjögren disease is another example of an area that has been “very haphazard,” he added.
The guidelines are aimed not just at specialists but also at general practitioners who treat many of these patients. But Dr. Hammitt emphasized that neurologists can be “instrumental” in identifying Sjögren disease in patients with PNS symptoms.
“Our hope is that specialists — in this case, neurologists — will recognize the potential for this condition in their PNS patients and ensure referral to a rheumatologist or knowledgeable family practitioner to manage overall care.”
The committee will soon submit its manuscript to the AAN for publication.
“Once published, we will have a robust dissemination strategy to ensure that providers, patients, and policymakers are aware of, and use, this very valuable resource,” said Dr. Hammitt.
No conflicts of interest were reported.
A version of this article appeared on Medscape.com.