What is the likely treatment for SCC of the nasopharynx?

Squamous cell carcinoma (SCC) of the nasopharynx is typically treated with external beam radiation therapy (EBRT) rather than surgery, particularly in cases where the tumor is locally advanced or has spread to lymph nodes. The rationale behind choosing EBRT as a primary treatment modality is based on the tumor's anatomical location and its association with radiation-sensitive cancer types.

In this context, administering 60 Gy of radiation over 6 weeks is a standard treatment regimen that provides a sufficient dose to effectively control local disease while trying to minimize damage to surrounding critical structures. This fractionation scheme allows for a balance between the total dose delivered and the potential side effects, facilitating better tolerance by the patient.

Other treatment options, such as brachytherapy, are less common for nasopharyngeal SCC and often reserved for specific situations or types of tumors. The doses of 30 Gy over 3 weeks or 60 Gy over 6 days may not provide therapeutic efficacy equivalent to the recommended 60 Gy over 6 weeks for this particular cancer in its typical presentation. Thus, the chosen treatment plan optimally addresses the necessary therapeutic dose while considering the patient's well-being.