preferred_name: Violet or brown colored hard plaque (most often on trunk, head, neck, and proximal extremities)
preferred_name_lc: violet or brown colored hard plaque (most often on trunk, head, neck, and proximal extremities)
label: Violet or brown colored hard plaque (most often on trunk, head, neck, and proximal extremities)
label_lc: violet or brown colored hard plaque (most often on trunk, head, neck, and proximal extremities)