Angiolymphoid hyperplasia with eosinophilia affecting the oral mucosa: report of a case and a review of the literature.

Angiolymphoid hyperplasia with eosinophilia (ALHE) is an uncommon disorder of unknown aetiology. Clinically, it is characterized by cutaneous papules or nodules on the head and neck, and extracutaneous involvement is rare. We report a 30-year-old woman who had an asymptomatic submucosal nodule on the upper lip, which histopathologically showed features of ALHE, and review the previously described 15 cases of oral ALHE.