Figure 4A-F illustrates the HLTF immunohistochemical expression in a series of 40 benign thyroid lesions including 10 with colloid nodules (CN), 16 with adenomas (Ad), 7 with Hashimoto’s thyroiditis (HT) and 7 with Grave’s disease (GD). The gene discussed is HLTF; the disease is hematocrit.