Oral hemorrhagic blister: an enigma
Angina bullosa hemorrhagica (ABH) is a sub epithelial oral mucosal Hemorrhagic blister of unknown aetiology.

Clinically, it presents as acute, spontaneous, asymptomatic hemorrhagic vesicle/bullae, commonly on the soft palate in middle aged individuals without any sex predilection. Histopathology reveals subepithelial blister containing RBC's with superficial perivascular lymphocytic infiltrate.

Though exact aetiology is not known, many local and systemic factors are incriminated in the causation of ABH. Published in the Indian Journal of Dermatology, the authors report two cases of ABH which was idiopathic in one case and other was associated with chronic renal failure on hemodialysis.

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