(a) Solid area of the tumor. (b) Cystic area of the tumor. (c) Lining cells of cyst are composed of eosinophilic cells. (d) Tumor cells are proliferative with microcystic component. (e) Tumor cells are predominantly proliferative with tubular pattern with dilated tubules. (f) Small amount of papillary pattern in the tumor. (g) Many dilated tubules were seen in the tumor. (h) Enlargement of nuclear but mild atypia of eosinophilic tumor cells. (i) Tumor cells of Mib-1 index are very low.