Pericarditis

Uremic pericarditis in chronic renal failure

Uneven, opaque and granular pericardium

It is also called 'bread and butter' pericarditis, except that the 'butter' has turned black in formalin

Myocardium on the left, fat and viscereal pericardiium on the right showing dense inflammation

Neutrophils, lymphocytes and plasma cells

An epicardial artery

Showing surrounding inflammation

Placenta

Chorioamnionitis

Villous tree branching from chorionic plate (right)

The chorionic plate (also called the fetal surface) is a thick layer of chorionic where the stem villi originate. Here the chorionic plate is also seem to be inflamed.

Neutrophils, lymphocytes and plasma cells

Pre eclampsia

Predominance of stem villi; majority of tertiary villi have syncytial knots

Congested stem villi

Fibrinous exudates

Calcification (blue)

Focal necrosis and fibrinous exudate

 Monochorionic diamniotic placenta

Section from the junction of two membranes; note two layers of amnion and no chorion in between