The majority of the patients that are diagnosed with neuroborreliosis actually instead have stage 2.
EFNS guidelines on the diagnosis and management of European Lyme neuroborreliosis
http://icnapedia.org/guidelines/open/EF ... liosis.pdf
More than 95% can be classified as early LNB (stage II), defined as signs and symptoms lasting for <6 months. Less than 5% have late LNB (stage III) with duration between 6 months and several years .