NP-C: heterogenous neurovisceral lipid storage disorder; mutations in NPC1 or NPC2
Neonatal cholestasis, splenomegaly, ataxia, vertical gaze palsy, neurodegeneration
‘Filipin test’ evaluates abnormalities of lysosomal cholesterol trafficking/egress.
Several newly developed plasma biomarkers allow inexpensive first screening tests.
Wide accessibility of biomarker analysis and gene sequencing will improve diagnosis.