Histologically, meningioma cells are relatively uniform, with a tendency to encircle one another, forming whorls and psammoma bodies ( laminated calcific concretions ).
2.
These are calcified remnants of papillary structures, and thus if a psammoma body is present anywhere within the tumor ( in the correct location ), then NIFTP cannot be diagnosed.
3.
Histopathologically, uterine serous carcinomas is typically characterized by ( 1 ) nipple-shaped structures ( papillae ) with fibrovascular cores ( 2 ) marked nuclear atypia ( irregularies in the nuclear membrane, enlarged nuclear size ), ( 3 ) psammoma bodies and ( 4 ) cilia.
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