Georgi Tchernev, Onkoderma-Clinic for Dermatology, Venereology and Dermatologic Surgery; Department of Dermatology and Venereology, Medical Institute of Ministry of Interior, Sofia, Bulgaria Simona Kordeva, Onkoderma-Clinic for Dermatology, Venereology and Dermatologic Surgery, Sofia, Bulgaria Viktor Marinov, Clinic of Purulent/Septic Surgery, Pirogov- University Multidisciplinary Hospital for Active Treatment and Emergency Medicine, Bulgaria Ilia Batashki, Department of Dermatology and Venereology, Sofia, Bulgaria Atanas Batashki, Department of Common and Vascular Surgery, Medical Institute of Ministry of Interior, Sofia, Bulgaria James W. Patterson, Department of Pathology, University of Virginia, Charlottesville, USA