A Depressed Bluish-black Plaque on the Shoulder: A Quiz
Xiaoting Song,
Jiaxing Zheng,
Shuxia Yang
Affiliations
Xiaoting Song
Department of Dermatology and Venerology, Peking University First Hospital, Beijing, China; Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China; National Clinical Research Center for Skin and Immune Diseases, Beijing, China; NMPA Key Laboratory for Quality Control and Evaluation of Cosmetics, Beijing, China
Jiaxing Zheng
Department of Dermatology and Venerology, Peking University First Hospital, Beijing, China; Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China; National Clinical Research Center for Skin and Immune Diseases, Beijing, China; NMPA Key Laboratory for Quality Control and Evaluation of Cosmetics, Beijing, China; Beijing Miyun District Hospital, Beijing, China
Shuxia Yang
Department of Dermatology and Venerology, Peking University First Hospital, Beijing, China; Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China; National Clinical Research Center for Skin and Immune Diseases, Beijing, China; NMPA Key Laboratory for Quality Control and Evaluation of Cosmetics, Beijing, China
