Convolutional Neural Network in Evaluation of Radiotherapy Effect for Nasopharyngeal Carcinoma
Table 1
Staging criteria for NPC.
Staging
Indexes
T: primary tumor
TX
Primary tumor cannot be evaluated
T0
There is no evidence of primary tumor, including EBV positive in cervical lymph nodes
T1
The tumor is confined to the nasopharynx, or invades the oropharynx and/or nasal cavity
T2
The parapharyngeal space and/or adjacent soft tissues are invaded, including the internal pterygoid muscles, the external pterygoid muscles, and the anterior vertebral muscles
T3
The skull base, cervical vertebrae, pterygoid structure, and/or paranasal sinuses are invaded
T4
Intracranial tumor invasion is found; and invasion of cranial nerves, hypopharynx, orbits, parotid glands, and/or soft tissue infiltration of lateral margin of pterygoid muscle are observed
N: regional lymph node
NX
Regional lymph nodes cannot be evaluated
N0
No regional lymph node metastasis is found
N1
There is unilateral cervical lymph node metastasis, and/or unilateral/bilateral retropharyngeal lymph node metastasis. The maximum diameter of the metastasis is ≤6 cm, and the metastasis occurs above the lower edge of the cricoid cartilage
N2
Bilateral cervical lymph node metastasis is found. The maximum diameter of the metastasis is ≤6 cm, and the metastasis is above the lower edge of the cricoid cartilage
N3
Unilateral or bilateral cervical lymph node metastasis is found. The maximum diameter of the metastasis is >6 cm, and/or the invasion exceeds the lower edge of the cricoid cartilage
