Fig. 5.

A and B. PNI that was correctly identified by AI. C and D. PNI that was reported false negative by AI. In C there is invasion of a ganglion, and in D there is a minimal entrapped nerve that resembles stroma (arrow). E and F. Structures that were reported false positive for PNI by AI. In E, there is mucinous fibroplasia resembling nerves (arrows), and in F, there is reactive stroma which mimics a nerve (arrow). All microphotographs show hematoxylin and eosin stains at 20× lens magnification