Abetalipoproteinemia. Report of an unusual patient

Abetalipoproteinemia (Bassen-Kornzweig syndrome, acanthocytosis) was diagnosed at age 13 months in a black male. At age 13 months, the electroretinogram was nonrecordable and a pigmentary retinopathy was obvious with ophthalmoscopy. Following dietary modification and vitamin supplementation, the scotopic electroretinogram improved to about 30% of normal.