Identification of Individual Histological and Blood Markers in Patients With Recurrent or Metastatic Upper Aerodigestive Tract Squamous Cell Carcinoma in Response to Immunotherapies

"Following the start of immunotherapy, an ENT surgeon will perform a cervico-facial tumor biopsy between D30 and D180. This will only be carried out if the tumour tissue is externalized and therefore accessible, and if the biopsy can be performed under local anaesthetic without any constraints for the patient (pain, risk of bleeding).~It consists of a superficial sampling of the externalized tumour lesion under local anaesthetic (xylocaine spray 5%, or xylocaine injectable 1%).~Biopsy of cervico-facial lesions under local anaesthetic is a commonly performed procedure. The main risk of this procedure is bleeding, which is very rare.~The biopsy will not be performed if the surgeon considers that the risk of bleeding is too great. Given the externalized nature of the lesion, biopsy does not entail any risk of tumour dissemination (possible for deep biopsies).~* Four 10-mL blood samples from two heparinized tubes~* Four 5-mL unstimulated saliva samples: non-invasive examination."