Interest of Bilateral Basic Tongue Mucosectomy Assisted by Robot or Laser in Combination with Tonsillectomy in the Assessment of Prevalent Cervical Lymphadenopathy

Inclusion Criteria: * Patient with a prevalent head and neck lymphadenopathy with positive or non-contributory fine needle aspiration, or having had an adenectomy revealing a metastasis of squamous cell carcinoma, a PET examination, an injected cervico-thoracic CT and an ENT work-up (nasofibroscopy) not finding a primary tumor * Performance Status \< 2 * Patient aged 18 or over * Patient affiliated with social security system * Informed consent signed Exclusion Criteria: * History of squamous cell carcinoma of the VADS or skin of the face. * History of cervico-facial radiotherapy * Primary tumor discovering during pan-endoscopy * Inexposable patient lead not to possible mucosectomy * Uncontrollable hemostasis disorders (contraindication to tonsillectomy and basic bilateral mucosectomy of language) * Distant metastases * Lymphadenopathy inoperable * Patient with a contraindication to radiotherapy * Pregnant or breastfeeding woman * Women of childbearing potential without effective contraception * Patient under guardianship or unable to give informed consent * Patient unable to undergo the trial follow-up for geographic, social or psychopathological reasons