Recessive dystrophic epidermolysis bullosa (RDEB) is a hereditary skin disease characterized by cutaneous and mucosa fragility. Blister formations and erosions, resulting in chronic wounds and dystrophic scars, lead development of aggressive cutaneous squamous cell carcinoma (cSCC) in young subjects. cSCC in RDEB patients are often recurrent and sometimes aggressive. Although fibrotic and inflammatory microenvironment plays an important role in the tumoral process, specific mechanisms in cSCC of RDEB patients are still unknown. Actually, the only treatment is a wide surgical excision with poor prognostic (80% of death after the first occurrence of cSCC).

The objective of the study is to describe the molecular signatures in the cSCC in RDEB patients

Inclusion Criteria:

• for RDEB patients with a SCC :

  1. aged older than 18 years old
  2. one or more SCC surgically treated
  3. signed genetic consent form

• for non-RDEB patients with a SCC induced by ultraviolet radiation :

  1. aged older than 18 years old
  2. one or more SCC induced by ultraviolet radiation
  3. signed genetic consent form

Exclusion Criteria:

• under protection by law (tutorship or curatorship)
• without health insurance coverage

RDEB patients with a SCC and non-RDEB patients with a SCC induced by ultraviolet radiation