*Department of Histopathology, University Hospital El Bierzo, Ponferrada, Spain;

†Department of Cellular Pathology, Hospital de la Reina, Ponferrada, Spain;

‡Research Department, Institute for Biomedical Research of A Coruña (INIBIC), University of A Coruña (UDC), A Coruña, Spain;

§Department of Dermatology, Hospital Universitario La Paz, Madrid, Spain;

¶Department of Dermatology, Hospital Universitario de Navarra, Pamplona, Spain;

‖Department of Pathology, Complejo Asistencial Universitario de Leon; and

**Department of Dermatology, University Hospital El Bierzo, Ponferrada, Spain.

Correspondence: Angel Fernandez-Flores, MD, PhD, Servicio de Anatomía Patologica, Hospital El Bierzo, Medicos sin Fronteras 7, 24411 Ponferrada, Spain (e-mail: [email protected]).

The authors declare no conflicts of interest.

Ethics approval: Approved.