The “spade sign” as a pathognomonic histopathologic feature of acne keloidalis: Analysis of 33 cases of cicatricial alopecia - 30/06/21

Maria Fernanda Ortega-Springall, MD ^a, Maija Kiuru, MD, PhD ^{a, b}, Maxwell A. Fung, MD ^{a, b, ⁎}

^a Department of Dermatology, Hospital General “D. Manuel Gea González”, Mexico City, Mexico 

^b Department of Dermatology and Pathology and Laboratory Medicine, University of California, Davis, Sacramento 

^∗Correspondence to: Maxwell A. Fung, MD, Department of Dermatology, University of California, Davis, 3301 C St, Suite 1400, Sacramento, CA 95816Department of DermatologyUniversity of CaliforniaDavis3301 C StSuite 1400SacramentoCA95816