1. Department of Pathology CHRU de Brest Brest France
2. EA4586 Laboratory of Neurosciences of Brest Universite de Bretagne Occidentale Brest France
3. Department of Dermatology CHRU de Brest Brest France
4. Department of Breast and Gynecological Surgical Oncology Hopital Europeen Georges Pompidou Paris Île‐de‐France France
5. Université Sorbonne Paris Cité Université Paris‐Descartes Paris Île‐de‐France France
6. Breton Competence Center of Rare Neuromuscular Diseases and Neuropathies with Cutaneous‐Mucosal Symptoms CHRU de Brest Brest France