Acute transverse myelitis: incidence and etiologic considerations

Area of Science:

• Neurology
• Epidemiology
• Immunology

Background:

• Population-based studies on acute transverse myelitis (ATM) are scarce, limiting understanding of its incidence and geographic distribution.
• The demographic and clinical characteristics of ATM require further investigation to inform public health strategies.

Purpose of the Study:

• To determine the incidence rate and population selectivity of acute transverse myelitis (ATM) in Israel.
• To explore potential risk factors, such as preceding infections, and the long-term outcomes of ATM.

Main Methods:

• A retrospective study analyzed data from all Jewish patients diagnosed with ATM in Israel between 1955 and 1975.
• Rigid diagnostic criteria were applied to a cohort of 62 patients.
• Incidence rates were calculated, and demographic, clinical, and outcome data were collected and analyzed.

Main Results:

• The average annual incidence rate of ATM was 1.34 per million population.
• No significant differences in incidence were observed based on place of birth (European/American vs. Afro/Asian) or season.
• A history of infection preceded ATM in 37% of cases, particularly in younger patients. ATM rarely progressed to multiple sclerosis, with over one-third achieving good recovery, another third fair recovery, and some experiencing no improvement or death.

Conclusions:

• Acute transverse myelitis (ATM) demonstrates a consistent incidence across different demographic groups in Israel, suggesting a potentially uniform underlying etiology.
• The findings highlight the importance of considering preceding infections as a potential trigger for ATM, especially in younger individuals.
• Further population-based studies are recommended to compare ATM incidence and characteristics globally, potentially elucidating its causes and improving patient outcomes.