Two distinct clinical subtypes of neuronal ceroid lipofuscinosis caused by
mutations in the PPT gene, INCL and vJNCL/GROD, occur at a high frequency i
n the central region of Scotland, In this paper we summarize the clinical d
etails and the molecular basis underlying the disease in the Scottish patie
nts. Comparison of the combination of mutations in the different clinical t
ypes reveals a clear genotype-phenotype correlation. (C) 1999 Academic Pres
s.