label: congenital lactic acidosis, Saguenay-Lac-Saint-Jean type
label_lc: congenital lactic acidosis, saguenay-lac-saint-jean type
description: Saguenay-Lac-St. Jean (SLSJ) type congenital lactic acidosis, a French Canadian form of Leigh syndrome, is a mitochondrial disease characterized by chronic metabolic acidosis, hypotonia, facial dysmorphism and delayed development.