Pt. Ozand et al., SANFILIPPO TYPE-D PRESENTING WITH ACQUIRED LANGUAGE DISORDER BUT WITHOUT FEATURES OF MUCOPOLYSACCHARIDOSIS, Journal of child neurology, 9(4), 1994, pp. 408-411
A 7-year-old girl presented with a language disorder reminiscent of ve
rbal auditory agnosia. Later, she proved to have defective N-acetylglu
cosamine-6-sulfate sulfatase, the enzyme deficient in Sanfilippo D syn
drome. She did not show clinical features of mucopolysaccharidosis. Th
e language disorder had a fluctuating course, which eventually evolved
into a progressive dementing encephalopathy. .