Spindle Cell Variant of Ameloblastic Carcinoma: Another Example in a Japanese Male

Figure 2

Light microscopic findings. Spindle cells dominate within the tumor and are associated with bizarre giant/multinucleated cells (a). Basaloid tumor cells form fusing nests with peripheral nuclear palisading (b) and characteristic cell dissociation reminiscent of enamel pulp (c). Spindle cells showing a storiform-like pattern (d) and bizarre giant/multinucleated cells (e). Small keratinizing foci are apparent (f). The metastatic tumor of the vertebra appearing along with surrounding soft tissue consisting of bland basaloid cells (g), and accompanied by ambiguous pseudolumina as well as intercellular dissociation of stellate cells (h).

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)