Study of Metabolic Changes in the Transformation Malignant Precancerous Skin Lesions

Skin carcinomas are the most frequent cancers in the world, including basal cell carcinomas and cutaneous squamous cell carcinoma (cSCCs), with more than 60.000 new annual cases in France. Their incidence increases mainly due to ultraviolet (UV) exposure and population ageing. Then from 1994 to 2006, the incidence of cSCC has increased by 300%. CSCCs typically manifests as a spectrum from a precursor actinic keratosis (AK) - possible spontaneous regression at this stage- to in situ cSCC invasive cSCC and finally metastatic cSCC.

Sex

All

Minimum age

18 Years

Inclusion Criteria:

* Every patient with suspected lesion :

  * AK,
  * in situ cSCC,
  * infiltrative cSSC
  * cSCC with recurrent disease
  * cSCC with cutaneous metastases.
* Patients 18 years of age or older,
* Patients with suspected AK or BCC lesions (in situ, infiltrating or metastatic),
* Patient able to sign a consent form,
* Patient affiliated with a Social Security system.

Exclusion Criteria:

* Prior systemic treatment such as checkpoint inhibitors or chemotherapy.
* Patients with cSCC or AK localized on visible zone of the face or folds

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• BACKGROUNDHosseini M, Dousset L, Michon P, Mahfouf W, Muzotte E, Bergeron V, Bortolotto D, Rossignol R, Moisan F, Taieb A, Bouzier-Sore AK, Rezvani HR. UVB-induced DHODH upregulation, which is driven by STAT3, is a promising target for chemoprevention and combination therapy of photocarcinogenesis. Oncogenesis. 2019 Sep 24;8(10):52. doi: 10.1038/s41389-019-0161-z. PMID 31551419
• BACKGROUNDMahfouf W, Hosseini M, Muzotte E, Serrano-Sanchez M, Dousset L, Moisan F, Rachidi W, Taieb A, Rudolf J, Rezvani HR. Loss of Epidermal HIF-1alpha Blocks UVB-Induced Tumorigenesis by Affecting DNA Repair Capacity and Oxidative Stress. J Invest Dermatol. 2019 Sep;139(9):2016-2028.e7. doi: 10.1016/j.jid.2019.01.035. Epub 2019 Mar 13. PMID 30878676
• RESULTDousset L, Khalife F, Chalopin-Fillot D, Dartigues B, Naji F, Mahfouf W, Muzotte E, Rousseau B, Amoedo N, Claverol S, Bondaz M, Beltzung F, Jullie ML, Vergier B, Taieb A, Favot-Laforge L, Rossignol R, Beylot-Barry M, Nikolski M, Rezvani HR. Metabolism-based scoring of cutaneous squamous cell carcinoma to predict tumour features and responses to treatment with dihydroorotate dehydrogenase inhibitors. Br J Dermatol. 2025 Oct 17;193(5):936-947. doi: 10.1093/bjd/ljaf253. PMID 40577595