Immune Biomarker Study for Salivary Gland Carcinoma

Inclusion Criteria: 1. Observational group * Initial diagnosis of a primary salivary gland carcinoma in the head and neck region (no squamous cell carcinomas) * Specimen collection from the center of the tumor when the primary tumor is sufficiently large without that the pathological assessment is impaired 2. Control group 1 * Initial diagnosis of a benign salivary gland tumor in the head and neck region * Specimen collection from the center of the tumor when the primary tumor is sufficiently large without that the pathological assessment is impaired 3. Control group 2 * functional diseases of the nose or ear (patients with the indication for functional ear surgery and rhinoplasty) * Specimen collection with sufficiently large resectate during a functional nose surgery for all groups: * Willingness of patients to collect blood, saliva and stool and consent to the preservation of all samples for study purposes. * Age ≥ 18 years * sufficient cognitive ability of the patients to understand the purpose of the study and to understand the purpose of the study and agree to it Exclusion Criteria: * Distant metastasis at the time of diagnosis and simultaneous second cancers, i.e. at study inclusion * Malignancy in the last 5 years regardless of location (except basal cell carcinoma or cis of the uterine cervix) * Carcinomas for which specimen collection is not possible or likely without compromising the compromise the pathological evaluation * Persistent drug or medication abuse * Patients who are unable or unwilling to comply with protocol and to be treated * Patients who are represented by a legal guardian * Patients who are not suitable for participation in the study due to a language barrier