A Case of Secondary Milium Caused by Pencil Injury / 대한피부과학회지

ABSTRACT

Milium is an asymptomatic, tiny, subepidermal, keratinous cyst found primarily on the cheek and eyelids. Milium is thought to result from pilosebaceous or eccrine duct plugging. Secondary milium develop when other underlying factors are present such as bullous diseases, various inflammatory skin diseases, and trauma. We report an 8-year-old boy who had a solitary, dome-shaped, whitish papule with 2x3 mm gray macule at the site, pricked by pencil. Histopathologically, the lesion showed the typical findings of milium and foreign body reaction caused by graphite. We treated this using punch excision and there has been no evidence of recurrence for 7 months.