A rare, genetic, inborn error of metabolism disorder characterized by global developmental delay, hypotonia, choreoathetosis, hypo-/alacrimia, and liver dysfunction which manifests with elevated liver transanimases and hepatocyte cytoplasmic storage material or vacuolization on liver biposy. Additional features reported include acquired microcephaly, hypo-/areflexia, seizures, peripheral neuropathy, intellectual and language/speech disability, additional ocular anomalies and EEG and brain imaging abnomalities.

An elevation in bone density in one or more phalanges of the fingers. Sclerosis is normally detected on a radiograph as an area of increased opacity.