Well-Differentiated Pancreatic Neuroendocrine Tumor: Does Morphologic Variant Matter?

PanNETs represent a group of neoplasms with significant histologic and cytologic variability that may complicate and confound diagnosis. Accurate recognition of these variants is crucial for effective diagnosis and in some cases carries important prognostic implications, particularly for more aggressive tumor forms (oncocytic, hepatoid, lipid rich, rhabdoid/plasmacytoid, and papillary). Additionally, certain morphologic variants or adjacent precursors may be linked to syndromic diseases or specific hormone expressions. Integrating detailed morphologic analysis with advanced molecular techniques is essential for diagnosis, predicting patient outcome, and improving patient management.