What are the Histological Features of Micropapillary Pattern?
Histologically, the micropapillary pattern is marked by small, tight clusters of cells that are not supported by fibrovascular cores. These clusters often appear to float in clear spaces, which are thought to be retraction artifacts. The cells themselves are typically high grade, with prominent nucleoli and a high mitotic index. The absence of a true fibrovascular core distinguishes this pattern from other papillary structures.
