Aspects of treatment of homocystinuria: an illustrative case report.

Cystathionine beta synthase deficiency homocystinuria is a heritable disorder most common in those of Irish descent. Therapy may prevent intellectual deficiency and dislocation of the ocular lenses. A female with this condition treated from the neonatal period to late adolescence is reported, including the use of betaine and antithrombotic drugs in management.