Fig. 5From: Non-hyalinizing trabecular thyroid adenoma: a novel thyroid tumor with diagnostic pitfalls of hyalinizing trabecular adenoma and medullary thyroid carcinomaTumor cells are positive for PAX8 (a) and TTF-1 (b) and negative for thyroglobulin (c). The inter- and intra-trabecular accumulation of type IV collagen-positive materials is not present (d)Back to article page