Aspartylglucosaminuria in a Puerto Rican family: Additional features of a panethnic disorder

D. Chitayat, S. Nakagawa, R. W. Marion, G. S. Sachs, S. Y.E. Hahm, H. S. Goldman

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


We report on 3 Puerto Rican brothers with the clinical and laboratory findings of aspartylglucosaminuria (AGU). Their parents were first cousins. The affected sibs have the 'cardinal' manifestations of AGU, including developmental disabilities, progressive 'coarsening' of the face, and early onset of hepatosplenomegaly. Biochemical studies showed elevated levels of urinary aspartylglucosamine and very low activity of aspartylglucosaminidase (AGA) in cultured fibroblasts. With long term follow-up, previously undescribed manifestations were noted, including radiographic evidence of spondylolysis and spondylolisthesis in early childhood and development of macro-orchidism during puberty. This family shows that AGU is not limited to individuals of Finnish background, but that the gene is panethnic in distribution and that additional changes, not previously noted, may present with advancing age.

Original languageEnglish (US)
Pages (from-to)527-532
Number of pages6
JournalAmerican journal of medical genetics
Issue number3
StatePublished - 1988
Externally publishedYes

ASJC Scopus subject areas

  • Genetics(clinical)


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