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Positive PPD skin test

Positive PPD skin test

Overview

The positive immunologic response to PPD antigen is seen here. The size of the papule is over 2 cm in diameter.

Review Date 12/10/2015

Updated by: Jatin M. Vyas, MD, PhD, Assistant Professor in Medicine, Harvard Medical School; Assistant in Medicine, Division of Infectious Disease, Department of Medicine, Massachusetts General Hospital, Boston, MA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.