Fig. 5From: Non-functioning parathyroid carcinoma: a case reportPathological findings. A solid tumor with broad fibrosis invading surrounding tissues was observed under ×100 field, and atypical cells containing oval and clear cytoplasm were observed under ×400 field. The cytoplasm was slightly stained for PTH and chromogranin A. Negative TTF-1 staining was noted in cancer cellsBack to article page