[MIM*253200] an error of mucopolysaccharide metabolism characterized by excretion of dermatan sulfate in the urine, growth retardation, lumbar kyphosis, sternal protrusion, genu valgum, usually hepatosplenomegaly, and no mental retardation; onset occurs after 2 years of age; autosomal recessive inheritance, caused by mutation in the arylsulfatase B gene (ARSB) on chromosome 5q. SYN: arylsulfatase B deficiency, mucopolysaccharidosis type VI.