Patterns of recurrence after selective postoperative radiation therapy for patients with head and neck squamous cell carcinoma

Table 2 Pathological characteristics and treatment details

NAC
Yes	8
No	64
Bi-lateral ND
Yes	26
No	46
Treatment for primary lesion
Surgery	60
EBRT	9
BT	3
Degree of differentiation
Poorly differentiated	20
Moderately differentiated	23
Well differentiated	15
Unknown	14
Extracapsular spread
Yes	46
No	10
Unknown	16
Positive/close margin
Yes	40
No	32
Concurrent systemic therapy
CDDP	17
Cetuximab	2
TS-1	2
None	51
RT total dose (Gy)
Median	66
Range	60–74
Radiation technique
3DCRT	14
IMRT	58

RT radiation therapy, NAC neoadjuvant chemotherapy, ND neck dissection, EBRT external beam radiation therapy
BT brachytherapy, LN lymph node, 3DCRT three-dimensional conformal radiation therapy, IMRT intensity modulated radiation therapy

ISSN: 1471-2407