Image Description
The invasive component in mucinous carcinomas shows two different patterns - expansile invasive pattern and destructive stromal invasion. The confluent glandular or expansile invasive pattern (shown here) consists of cribriform and papillary foci as well as crowded, back-to-back glands with little or no intervening stroma, creating a complex architectural appearance. There are no obvious areas of stromal invasion. The neoplastic cells show moderate to severe cytologic atypia.