Large mucinous cystic neoplasm of the pancreas associated with pregnancy

Figure 1 Abdominal computed tomography scan showing a huge cyst measuring 18 cm in diameter.

Figure 2 Macroscopic view of the cystic tumor.

Figure 3 Microscopic findings of the cystic tumor. A: Columnar, mucin-producing epithelium with underlying ovarian-type stroma (HE, × 100); B: The epithelium had a focal papillary architecture (HE, × 100); C: Positive staining in the stromal cell nuclei for progesterone receptor (× 400); D: The estrogen receptor of stromal cell nuclei (× 400).