Caption |
Pancreatic mass: the neoplasm is composed of interconnected trabeculae of variable thickness supported by a moderate amount of fibrovascular stroma with a few moderately ectatic blood-filled vascular spaces. Some trabeculae show central cavitation and, as a result, transform into pseudocysts lined by a one cell-thick epithelium with prominent nuclear palisading. These pseudocysts contain cellular debris and a proteinaceous material. Neoplastic cells are closely-packed, small to medium-sized, polygonal, with indistinct cell borders, and with a small amount of pale acidophilic cytoplasm. The nucleus is central, round, hyperchromatic, and with a clumped chromatin. Mitoses and apoptotic neoplastic cells are numerous. |