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The wider expanse of the placenta contained the fetus; the other must have extended into the other uterine cornu.
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Gross appearance of cord insertion and branching of cord vessels.
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Umbilical cord showing the foci of pigmented squamous metaplasia.
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There are four vessels and a large allantoic duct. Numerous thick ‘callosities' are found on the surface.
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In other regions of the cord, the ‘callosities' are much smaller.
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The allantoic duct epithelium had detached. It is cuboidal and focally vacuolated.
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One of the major ‘callosities' showing the marked squamous metaplasia.
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Some of the areas of squamous metaplasia are heavily pigmented.
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