Modern management of distant metastases from head and neck squamous cell carcinoma

The rate of distant metastases in patients with head and neck squamous cell carcinoma (HNSCC) ranges between 4 and 26%. Their appearance marks a critical stage in disease progression, significantly reducing survival rates. Treatment options require a multidisciplinary approach and differ based on the number and extension of distant metastases. The aim of this narrative review is to provide a comprehensive and updated overview of the current state of the art in management of such a clinical scenario.

Accurate detection and staging of distant metastases are essential to determine prognosis and guide therapeutic strategies. Oligometastatic condition refers to patients with only a few distant metastases (up to 5). Surgery or stereotactic body radiotherapy are the best curative treatment options for oligometastatic. However, the majority of HNSCC has a polymetastatic disease, not amenable to curative approach. Therefore, systemic therapies, including chemotherapy (CHT) or target molecular therapy and/or best supportive care, are usually reserved to these patients. Rarely, head and neck region, in particular supraclavicular cervical lymph nodes, may be a site of distant metastases from non-head and neck cancer, particularly from the genitourinary and gastrointestinal tracts.

The occurrence of distant metastases in HNSCC represents a pivotal point in the disease progression, lowering survival rates. Pattern of distant metastases has been related to survival outcomes. Patients with distant metastases from an HNSCC always require a multidisciplinary approach and an accurate selection is necessary to individualize the best treatment strategy.