PMC5728194_01
A tense, blood-filled bullae on the tongue.
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 On dermatological examination we observed a tense, blood-filled bullae on his tongue with no additional dermatologic finding ( Figure 1).
Subepithelial blister and a few inflammatory cells seen in routine hematoxylin and eosin section (10x).. The subepithelial space was filled with erythrocytes.
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There were a few inflammatory cells and the subepithelial space was filled with erythrocytes ( Figure 2).