Fig. 2From: Primary leiomyosarcoma of the thyroid with concurrent papillary thyroid cancer: a rare case report and a review of literatureImmunohistochemical staining of the leiomyosarcoma (original magnification × 100). Positive staining for SMA (A), Desmin (B), and Caldesmon (C). TTF-1 is negative in tumor cells while highlighting the nuclei of entrapped follicular cells (D)Back to article page