Angina bullosa hemorrhagica: report of 7 cases and analysis of 199 cases from the literature.

Angina bullosa hemorrhagica (ABH) is a condition characterized by blood blisters in the oral or oropharyngeal mucosa. Typically, the first presentation of ABH is acute, and rupture of the blisters occurs after a few hours or days. Although its etiology is unclear, ABH is assumed to be associated with predisposing factors such as local trauma or chronic use of inhaled steroids. The diagnosis is defined clinically, based on the presentation and evolution of the lesions. The recommended treatment is symptomatic, but extensive lesions may present a risk of airway obstruction and may require surgical excision. This case series reports 7 cases of ABH and reviews 199 cases published in the English-language literature. The possible etiologic factors, predisposing factors, and differential diagnoses are discussed.