Fig. 3.
Visualization of PUNLMP with light microscopy. a Long- and slender-branched papillae is a characteristic histological clue for a diagnosis of PUNLMP. b Branched papillae are fused. c Basal palisading feature is another indicator of PUNLMP. d Branched fused papillae with basal palisading feature are a characteristic feature of PUNLMP