Table 5.

EP histological pattern

EP histology	Stromal atypia, explained as pleomorphism, and categorized as mild, moderate, and severe.
	Glandular crowding, explained as the existence of discrete foci measuring at least 0.5 mm whither gland/stroma proportion overrunned 50%, and which was devoid of any cytological delimitation.
	Infarction, explained as zones of necrosis, sharply defined zones of acellular hyalinization, and diverse other changes [63].
	Periglandular condensation of stromal cells, distinct from the background away from glands.
	Diffuse stromal hypercellularity, explained as a level of cellularity that is similar with endometrial stroma in the proliferative stage in most of the polyps.
	Prominent thick-walled vessels in most fragments of the polyp.
	Bizarre stromal cells, different from severe atypia, based on multinucleation concurrent with hyperchromasia [64].
	Stroma predominant fragments, explained as EP fragments with only minimal (<10%) epithelium.
	Intraglandular stromal papillation, explained as stromal protrusion within glandular spaces irrespective of the extent [65].

Adapted from [54]. EP: Endometrial polyp.