hyper-beta-aminoisobutyric aciduria

hy·per-β-am·i·no·i·so·bu·ty·ric ac·i·du·ri·a

(hī'pĕr-am'i-nō-ī'sō-byū-ti'rik as'i-dū'rē-ă),
Elevated levels of β-aminoisobutyric acid in the urine; believed to be due to a deficiency of liver β-aminoisobutyrate:pyruvate aminotransferase.