Figure 2: Grading of carcinoma breast and NIS expression (a-f), grade1 (a), grade2 (c); (H and E, ×20)and grade3 (e H and E, ×40) NIS expression in (e, ×10), (e, ×20), (f, ×40); NIS at metastatic sites with tumor (g-l), lymph node (g, h) metastasis show strong expression (g, ×10), lymphoid parenchyma negative (h, ×40), bone marrow biopsy core (l, ×20 and J, ×40) positive in both tumor and native marrow cells including megakaryocytes (arrow), endometrium (k, l, ×20) tumor is strong positive, endometrial glands show variable positivity