Idiopathic Facial Aseptic Granuloma: Clinical and Ultrasound Findings in 3 Cases.

Idiopathic facial aseptic granuloma is a typical childhood disease characterized by the presence of one or more asymptomatic nodules on the cheek. Although pathogenesis remains unclear, the disease is thought to be a type of childhood rosacea. It resolves spontaneously, yet it could be confused with other lesions that require treatment. We present clinical and ultrasound findings and outcome from 3 new cases. In 2 cases, the lesion presented as childhood rosacea. Ultrasound revealed a characteristic pattern, with variations depending on the stage of development. High-frequency ultrasound can facilitate the differential diagnosis and thus obviate unnecessary biopsy or excision.