Study: NCT05341479

Intervention type: PROCEDURE
Intervention: Surgery for early-stage OPC
Description: The treatment strategy for patients should be discussed by the multidisciplinary team with the goal of maximizing survival with preservation of appearance and function and planned based on the tumor extension as ascertained by clinical evaluation and careful interpretation of appropriate imaging examinations.~Early-stage OPC patients (T1-2,N0) enrolled in this group will be treated with surgical resection. The surgical techniques of the primary tumor include transoral robotic surgery, conventional transoral surgery, transoral laser microsurgery (e.g., CO2 laser resection), and open surgery. Ipsilateral neck dissection should be performed for patients enrolled in this group. For patients with OPC at or approaching the midline, bilateral neck dissection should be strongly considered.~Postoperative radiotherapy (RT) or system therapy/RT should be considered for patients with adverse features (e.g., extranodal extension, perineural invasion or vascular invasion).

Intervention type: RADIATION
Intervention: RT for early-stage OPC
Description: The treatment strategy for patients should be discussed by the multidisciplinary team with the goal of maximizing survival with preservation of appearance and function and planned based on the tumor extension as ascertained by clinical evaluation and careful interpretation of appropriate imaging examinations.~Early-stage OPC patients (T1-2,N0) enrolled in this group will be treated with RT.

Intervention type: RADIATION
Intervention: CRT for advanced OPC
Description: The treatment strategy for patients should be discussed by the multidisciplinary team with the goal of maximizing survival with preservation of appearance and function and planned based on the tumor extension as ascertained by clinical evaluation and careful interpretation of appropriate imaging examinations.~Advanced OPC patients (T1-2,N1-3/T3-4,N0-3) enrolled in this group will be treated with CRT.

Intervention type: OTHER
Intervention: Surgery for advanced OPC
Description: The treatment strategy for patients should be discussed by the multidisciplinary team with the goal of maximizing survival with preservation of appearance and function and planned based on the tumor extension as ascertained by clinical evaluation and careful interpretation of appropriate imaging examinations.~Advanced OPC patients (T1-2,N1-3/T3-4,N0-3) enrolled in this group will be treated with surgical resection. The surgical techniques of the primary tumor include transoral robotic surgery, conventional transoral surgery, transoral laser microsurgery, and open surgery. Ipsilateral neck dissection should be performed for patients enrolled in this group. For patients with OPC at or approaching the midline, bilateral neck dissection should be strongly considered.~Postoperative radiotherapy (RT) or system therapy/RT should be considered for patients with adverse features (e.g., pT3 or pT4 primary, pN2 or pN3 nodal disease, extranodal extension, or vascular invasion).

Intervention type: PROCEDURE
Intervention: Neoadjuvant treatment for advanced OPC
Description: The treatment strategy for patients should be discussed by the multidisciplinary team with the goal of maximizing survival with preservation of appearance and function and planned based on the tumor extension as ascertained by clinical evaluation and careful interpretation of appropriate imaging examinations.~Advanced OPC patients (T1-2,N1-3/T3-4,N0-3) enrolled in this group will be treated with neoadjuvant treatment. The subsequent treatments include RT, system therapy/RT, and surgical resection with or without postoperative adjuvant therapy.