Onychocytic matricoma (OCM) is a benign acanthoma of the nail unit that presents with localized thickening of the nail plate and melanonychia.1 This newly described entity has suggestive clinical features and distinctive histopathologic changes.
Article InformationCorresponding Author: Adam I. Rubin, MD, Department of Dermatology, Hospital of the University of Pennsylvania, 3600 Spruce St, 2 Maloney, Philadelphia, PA 19104 (Adam.Rubin@uphs.upenn.edu).
Published Online: February 5, 2014. doi:10.1001/jamadermatol.2013.6358.
Conflict of Interest Disclosures: None reported.
Additional Information: Dr Wanat is now with the Department of Dermatology, University of Iowa, Iowa City.