Successful Treatment of Angiolymphoid Hyperplasia with Eosinophilia Associated with Scalp Demodicosis Using Cryotherapy and Topical Metronidazole

Abstract

Angiolymphoid hyperplasia with eosinophilia (ALHE) is a rare, benign, vasoproliferative tumour. We report a 25-year-old female patient who reported in 2021 to the dermatology clinic, with multiple, grouped, erythematous dome-shaped papules and nodules of 6 months duration on the left temporo-occipital region. Biopsy findings were consistent with a diagnosis of ALHE with evidence of Demodex mite infestation in the sebaceous ducts. The patient demonstrated significant improvement following 7 weeks of treatment with multiple cryotherapy sessions and topical application of metronidazole gel. This case suggests that scalp demodicosis may represent a novel trigger for the development of ALHE.

Keywords: Angiolymphoid Hyperplasia with Eosinophilia; Mite; Infestation; Scalp; Kimura disease; Cryosurgery; Metronidazole; Case Report.