Table 1 Indications for the diagnostic LP under consideration of the contraindications (see below)

Suspected condition

 …Meningitis

 …Encephalitis

 …Myelitis

 …Neuroborreliosis

 …Neurotuberculosis

 ...Polyradiculoneuritis Guillain-Barré

 …Chronic inflammatory demyelinating polyneuropathy

 …Encephalomyelitis disseminata

 …Neuromyelitis optica spectrum disorder

 …Neurosarcoidosis

 …Neurolupus

 …Subarachnoidal hemorrhage

 …Meningiosis carcinomatosa

 …Meningiosis lymphomatosa

 ...Idiopathic intracranial hypertension

 ...Normal pressure hydrocephalus

Differential diagnosis of the following core symptoms:

 -Headache

 -Dementia syndrome

 -Sepsis with unknown focus of infection