annulate lamellae

an·nu·late la·mel·lae

several pairs of parallel, smooth membranes, each pair containing regularly spaced pores resembling those of the nuclear envelope; they occur in germ cells, embryonic cells, and neoplastic cells.
References in periodicals archive ?
Mitotic activity, annulate lamellae, invasion of the basal lamina of blood vessels at the Virchow-Robin space, and necrosis.