An irregular black patch on the nail plate

• Payal Shah, BS,
• Maressa C. Criscito, MD,
• Nooshin K. Brinster, MD,
• David Polsky, MD, PhD

Affiliations

Payal Shah, BS

The Ronald O. Perelman Department of Dermatology, New York University Grossman School of Medicine, New York, New York

Maressa C. Criscito, MD

The Ronald O. Perelman Department of Dermatology, New York University Grossman School of Medicine, New York, New York

Nooshin K. Brinster, MD

The Ronald O. Perelman Department of Dermatology, New York University Grossman School of Medicine, New York, New York

David Polsky, MD, PhD

Correspondence to: David Polsky, MD, PhD, New York University Grossman School of Medicine, 522 First Ave, SML-404, New York, NY 10016.; The Ronald O. Perelman Department of Dermatology, New York University Grossman School of Medicine, New York, New York