Head and Neck Oncologic Surgery: Staging, Workup, and Multidisciplinary Care
Head and neck oncology questions test staging logic, anatomic boundaries, and treatment sequencing. Know the AJCC TNM principles: T reflects primary tumor size and invasion, N reflects nodal burden (number, size, laterality, extracapsular extension), and M reflects distant disease. Understand that HPV-positive oropharyngeal squamous cell carcinoma has a distinct, more favorable staging system and prognosis than HPV-negative disease.
Master the nodal levels (I–VI) and their drainage patterns: level I submental/submandibular (oral cavity), level II–III upper/mid jugular (oropharynx, larynx, hypopharynx), level IV lower jugular (thyroid, hypopharynx), level V posterior triangle (nasopharynx, skin), level VI anterior compartment (thyroid, larynx). Know that extracapsular extension worsens prognosis and often mandates adjuvant chemoradiation.
Understand the treatment paradigm: early-stage disease often single-modality (surgery or radiation); advanced disease often combined surgery plus adjuvant radiation/chemotherapy. Recognize the role of sentinel node biopsy in early oral cavity cancer and the importance of margin status and perineural/lymphovascular invasion in adjuvant decisions.
Traps: staging a neck node without examining the primary site; forgetting that distant metastasis changes intent; and missing second primary tumors in smokers. Also know that salvage surgery is an option for recurrent disease after radiation.
Rule of thumb: "Stage the primary and the neck together; treatment intent follows M status."
Worked example: A patient with a T2N1 oral tongue cancer and a positive margin after resection should be considered for adjuvant radiation with or without chemotherapy, given the high-risk feature.