Background
Angina bullosa hemorrhagica (ABH) is the term used to describe acute, benign, and generally subepithelial oral mucosal blisters filled with blood that are not attributable to a systemic disorder or hemostatic defect.
This condition was first described in 1933 as traumatic oral hemophlyctenosis. Badham first used the currently accepted term angina bullosa hemorrhagica in 1967.
The lesions may be confused with other more serious disorders (eg, mucous membrane pemphigoid, epidermolysis bullosa, linear IgA, dermatitis herpetiformis); however, the isolated nature, rapid healing, and rare recurrence of angina bullosa hemorrhagica blisters generally are sufficient findings to rule out the previously mentioned conditions.
The lesions of angina bullosa hemorrhagica may be indistinguishable from blood blisters related to thrombocytopenia; however, blood tests and the absence of areas of ecchymosis, epistaxis, or gingival bleeding are helpful signs to rule it out.
Some authors suggest mild trauma as the causative agent in angina bullosa hemorrhagica to break the epithelial–connective-tissue junction, causing bleeding of superficial capillaries and resulting in the formation of a subepithelial hemorrhagic bullae.
Also see the eMedicine articles Bullous Pemphigoid, Epidermolysis Bullosa, Linear IgA Dermatosis, and Dermatitis Herpetiformis.
Epidemiology
Mortality/Morbidity
Angina bullosa hemorrhagica is a benign condition; however, some authors have reported acute upper airway obstruction associated with rapidly enlarging bulla of the posterior pharynx and epiglottic region.[1] Rarely, tracheal intubation and surgical tracheostomy are required in angina bullosa hemorrhagica patients.
Sex
No sex predilection is reported for angina bullosa hemorrhagica.
Age
Angina bullosa hemorrhagica predominantly affects middle-aged or elderly people. The median age at angina bullosa hemorrhagica presentation is 54 years, with 60% of the patients in the range of 45-70 years. Lesions have not been documented in children younger than 10 years.
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