Demystifying MR Neurography of the Lumbosacral Plexus: From Protocols to Pathologies

Table 6

Summary of features for main lesions in MRN.

Etiology	Enlargement	T2 hyperintensity	Fascicular pattern	Course	Enhancement
Trauma			Minimally effaced/disrupted	May be altered due to hematoma/fracture
CIDP			Effaced/preserved	Not altered
Infectious			Effaced/preserved	May be altered by abscess/granulation tissue
CMT			Preserved or fatty infiltration around atrophic fascicles	Normal
Radiation	(linear geographic distribution of radiation field)		Preserved/effaced	Altered in subacute-chronic stages due to developing fibrosis
NF1			Preserved	Altered with focal masses