Background
The spectrum of CNS idiopathic inflammatory demyelinating disease (CNS-IIDD) in the elderly is uncertain.
Objective
To describe the clinical, radiological, and pathological features of a cohort of 30 pathologically proven CNS-IIDD patients ≥65 years.
Methods
Elderly MS/CIS patients were compared to a cohort of 125 patients with pathologically proven MS/CIS and symptom onset <65 years.
Results
Median age at symptom onset was 69 years (IQR 68–75). Median follow-up was 1.9 years (IQR 1.0–5.6). Diagnoses were MS (14/30), CIS (11/30), NMO (4/30), and ADEM (1/30). Disability was higher in patients with MS/CIS ≥65 compared to patients <65 (median EDSS 4 [IQR 2.5–7] vs. 2.5 [IQR 1.5–4]; p=0.002). When compared to patients <65, there was no difference in the lesion size, number of patients fulfilling Barkhof’s criteria, edema or mass effect. Confluent demyelination was observed in 27 patients [MS/CIS (23/25), NMO (4)], two had a mixed perivenular/confluent pattern [MS (1), ADEM(1)] and one patient with MS had a mixed confluent/perivenular/coalescent pattern. Early active lesions were found in 19/30 patients ([MS 4, CIS 13, NMO 2], 53%). Cortical demyelination was present in 7/12 (58%) patients [MS(3), CIS(3), ADEM (1)].
Conclusions
A spectrum of CNS-IIDD can develop in the elderly, with presenting symptoms similar to younger patients. Early diagnosis of CNS demyelinating disease is essential to avoid invasive and disabling procedures.