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Old, chronic avascular hyalinized villi show mineralization in the basal lamina beneath the trophoblastic layer, visible in this hematoxylin-eosin–stained section. Such hyalinized villous lesions were extensive in multiple sections of this placenta (hematoxylin-eosin, original magnification ×200). This is the same same placenta as shown grossly in Fig. 3.
