Angina bullosa haemorrhagica--a report of three cases and review of the literature.

Angina bullosa haemorrhagica (ABH) is a term that was first introduced by Badham in 1967 to describe a bullous disorder in which recurrent oral blood blisters appear in the absence of any identifiable systemic disorder. The aetiology of this condition remains obscure. Three cases are described, and their similarities and differences discussed. In one case the histopathology showed an intradermal blister; this feature has not previously been recorded for this condition.