"Meningeal biopsy reveals "storiform" fibrosis with lymphoplasmacytic infiltration of IgG4-positive plasma cells (either > 10 cells/HPF or IgG4:IgG ratio >40%) and obliterative phlebitis."
"T1: isointense dural thickening"
"T1 C+ (Gd): homogeneous enhancement"
"T2/FLAIR: markedly hypointense due to underlying fibrosis (a reasonably specific imaging finding)"
"GRE/SWI: hypointense due to underlying fibrosis"
"Meningeal biopsy reveals "storiform" fibrosis with lymphoplasmacytic infiltration of IgG4-positive plasma cells (either > 10 cells/HPF or IgG4:IgG ratio >40%) and obliterative phlebitis."
"Findings on CT can be very subtle. Plaque-like dural thickening may or may not be evident. Focal nodular thickening may mimic a meningioma."
Expected headings
"FDG-PET"
"In addition to radiographic features of IgG4-related hypertrophic pachymeningitis, which are detailed below, other associated head and neck manifestations of IgG4-related disease, such as IgG4-related-hypophysitis, lacrimal and salivary gland enlargement and inflammation, orbital pseudotumour, and perineural spread along trigeminal and other cranial nerves, may also be seen."
"In addition to radiographic features of IgG4-related hypertrophic pachymeningitis, which are detailed below, other associated head and neck manifestations of IgG4-related disease, such as IgG4-related-hypophysitis, lacrimal and salivary gland enlargement and inflammation, orbital pseudotumour, and perineural spread along trigeminal and other cranial nerves, may also be seen."