1. Borderline/ atypical proliferative/ low
malignant potential mucinous tumor, gastrointestinal type. Cystic component
with stratified epithelium: low-power magnification of one case (1A)
and intermediate-power magnification of another case (1B). High-power
magnification of Fig. 1A (1C) showing cystic component lined by columnar
cells with mucinous cytoplasm and low nuclear-to-cytoplasmic ratio.
The nuclei are round to oval, basally situated, and feature only mild
atypia. Submitted by Russell Vang, MD