Fig. 1

Pathological sections of hematoxylin and eosin revealed that ovarian primary PNET comprises a homogeneous population of small- to medium-sized round primitive cells that grow in sheets, nests and cords. They display high nuclear-to-cytoplasmic ratios and brisk mitotic activity. Figures are from case 3 (description refers to the main text). a 100 × . (b) 400×