1. Department of Dermatology Rennes University Hospital Rennes France
2. Department of Dermatology AP‐HP Henri Mondor Hospital Creteil France
3. Department of Dermatology Tours University Hospital and François Rabelais University Tours France
4. Department of Dermatology AP‐HP St Louis Hospital Paris 7 University Paris France
5. Department of Pathology AP‐HP Henri Mondor Hospital Creteil France
6. Department of Pathology Rennes University Hospital Rennes France
7. Laboratory of Histopathology Reims University Hospital Reims France
8. Lymphoid Malignancies Unit AP‐HP Henri Mondor Hospital Creteil France
9. Department of Hematology Rennes University Hospital Rennes France
10. Department of Dermatology Reims University Hospital Reims France