This interactive module covers the historical, current, and future use of biomarkers to diagnose, treat, and monitor patients with Lysosomal Storage Diseases, or LSDs. Each of the 3 clinical cases involving an LSD features unexpected twists or curveballs. Learn more about the use of biomarkers in GD (Gaucher disease), MPS II (Mucopolysaccharidosis type II), and MLD (Metachromatic leukodystrophy).