Mesothelium
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The mesothelium is a membrane composed of simple squamous epithelial cells of mesodermal origin, which forms the lining of several body cavities: the pleura, peritoneum and pericardium.
Cytology of normal mesothelial cells, with typical features. Wright's stain
Histology of a cross-section of the peritoneal mesothelial lining, and underlying fibrous tissue. H&E stain.
Micrograph of benign mesothelial cells. Peritoneal wash. Pap stain.
Cytology of reactive mesothelium, with typical features. The main causes of reactive mesothelium are infection, trauma and cancer. Wright's stain.
Germinal epithelium (female)
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The ovarian surface epithelium, also called the germinal epithelium of Waldeyer, or coelomic epithelium, is a layer of simple squamous-to-cuboidal epithelial cells covering the ovary.
Histology of ovarian surface epithelium. H&E stain. The epithelium is the chain-like covering with round dark blue nuclei at top.