Intratumoral Microdosing of TAK-981 in Head and Neck Cancer

Inclusion Criteria: 1. Ability and willingness to comply with the study's visit and assessment schedule. 2. Male or female ≥ 18 years of age at Visit 1 (Screening). 3. Pathologic diagnosis of primary cancers of the head and neck. 4. Ability and willingness to provide written informed consent. Voluntary written consent must be given before performance of any study related procedure not part of standard medical care, with the understanding that consent may be withdrawn by the patient at any time without prejudice to future medical care. 5. At least one lesion (primary tumor, recurrent tumor, or effaced metastatic lymph node) ≥ 2 cm in the shortest diameter that is surface accessible for CIVO injection that may be guided by ultrasound if appropriate and for which there is a planned surgical intervention. Treatment plan may include adjuvant radiation or chemotherapy and patients must have no medical contraindication to surgery. 6. ECOG (Eastern Cooperative Oncology Group) performance status of 0-2. 7. Female patients who: * Are postmenopausal for at least one year before the screening visit, OR * Are surgically sterile, OR * If they are of childbearing potential, agree to practice two effective methods of contraception, at the same time, from the time of signing of the informed consent through four months after the tumor injection procedure, OR agree to completely abstain from heterosexual intercourse. * Agree to refrain from donating ova during study participation. Male patients, even if surgically sterile (i.e., status post-vasectomy), who: * Agree to practice effective barrier contraception during the entire study treatment period through four months after the tumor injection procedure, OR * Agree to completely abstain from heterosexual intercourse. * Agree to refrain from donating sperm during study participation. Exclusion Criteria: 1. Tumors or effaced nodes that are anticipated by the Investigator to lack a sufficient volume of viable tumor tissue (based on available pre-operative imaging, pre-injection ultrasound imaging, or pathology reports) for CIVO injection due to size, location, necrosis, cysts, excessive stroma, fibrosis, or treatment-induced tissue changes. Lesions that have received neoadjuvant radiation therapy may lack sufficient viable tumor tissue for CIVO injection procedures. 2. Patients who have received prior treatment with cetuximab or immune checkpoint inhibitors. 3. Female patients who are both lactating and breastfeeding or have a positive serum pregnancy during the screening period or a positive urine pregnancy test on Day 1 before the tumor injection procedure. 4. Any uncontrolled intercurrent illness, condition, serious medical or psychiatric illness, or circumstance that, in the opinion of the Investigator, could interfere with adherence to the study's procedures or requirements, or otherwise compromise the study's objectives. 5. Patients with uncontrolled autoimmune diseases requiring treatment. 6. Patients with human immunodeficiency virus/acquired immune deficiency syndrome (HIV/AIDS) with uncontrolled viral load and CD4 (Cluster of Differentiation 4) less than 200. 7. Patients that have received a live vaccine within 4 weeks of the baseline/screening visit. 8. Patients with a sensitivity to Captisol. 9. Use of any of the following ≤ 2 weeks prior to CIVO injection: 1. Immunosuppressive drugs (e.g., calcineurin inhibitors) 2. Biological response modifiers for autoimmune disease 3. Systemic glucocorticoids: oral or parenteral corticosteroids at a dose ≥ 20 mg/day prednisone, or equivalent Note: physiologic replacement dosing of steroids (≤ 3mg/m2/d prednisone or equivalent), low-dose corticosteroids for dye allergies prior to staging scans or use in anti-emetic prophylaxis for patients undergoing chemotherapy, or topical steroids, are allowed 4. Hematopoietic growth factors