Fig. 3
From: Primary intraosseous carcinoma in the pediatric and adolescent mandible
Representative histopathological features. a Solid nests or sheets of tumor cells with high cellularity. b Round monotonous tumor cells showing high N/C ratio and abnormal mitoses (indicated by the arrows). c Diffuse strong positivity for CK-pan. d Negative expression of CD99. e Focal immunoreactivity for synaptophysin. f Focal immunoreactivity for chromogranin A