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Table 1 The characteristics, staging categories, and treatment regimens of NPC patients

From: Prognostic value of MRI-derived masticator space involvement in IMRT-treated nasopharyngeal carcinoma patients

Characteristics

All patients

MSI

MPM only

LPM

ITF

No. of patients

1197

283 (23.64 %)a

102 (8.52 %)

181 (15.12 %)

19 (1.59 %)

Male

905 (75.61 %)

224 (79.15 %)

77 (75.49 %)

147 (81.22 %)

14 (73.68 %)

Female

292 (24.39 %)

59 (20.85 %)

25 (24.51 %)

34 (18.78 %)

5 (26.32 %)

Median age (y)

46

46

46

46

46

Age range (y)

11-84

11-84

11-84

12-79

22-76

Pathological typesb

     

WHO type III

1134 (94.74 %)

270 (95.41 %)

97 (95.10 %)

173 (95.58 %)

16 (84.21 %)

WHO type II

51 (4.26 %)

8 (2.83 %)

2 (1.96 %)

6 (3.32 %)

3 (15.79 %)

WHO type I

12 (1.00 %)

5 (1.76 %)

3 (2.94 %)

2 (1.10 %)

0

Clinical Stagesc

     

Stage I

57 (4.76 %)

0

0

0

0

Stage II

314 (26.23 %)

11 (3.89 %)

6 (5.88 %)

5 (2.76 %)

0

Stage III

541 (45.20 %)

112 (39.57 %)

62 (60.79 %)

50 (27.62 %)

1 (5.26 %)

Stage IVa

223 (18.63 %)

137 (48.41 %)

30 (29.41 %)

107 (59.12 %)

16 (84.21 %)

Stage IVb

62 (5.18 %)

23 (8.13 %)

4 (3.92 %)

19 (10.50 %)

2 (10.53 %)

T classifications

     

T1

295 (24.64 %)

0

0

0

0

T2

225 (18.8 %)

12 (4.24 %)

7 (6.86 %)

5 (2.76 %)

0

T3

441 (36.84 %)

120 (42.40 %)

64 (62.75 %)

56 (30.94 %)

0

T4

236 (19.72 %)

151 (53.36 %)

31 (30.39 %)

120 (66.30 %)

19 (100 %)

N classifications

     

N0

170 (14.20 %)

50 (17.67 %)

22 (21.57 %)

28 (15.47 %)

6 (31.58 %)

N1

675 (56.39 %)

148 (52.30 %)

51 (50.00 %)

97 (53.59 %)

6 (31.58 %)

N2

290 (24.23 %)

62 (21.91 %)

25 (24.51 %)

37 (20.44 %)

5 (26.32 %)

N3a

26 (2.17 %)

8 (2.82 %)

0

8 (4.42 %)

0

N3b

36 (3.01 %)

15 (5.30 %)

4 (3.92 %)

11 (6.08 %)

2 (10.52 %)

Chemotherapy

     

Induction

919 (76.78 %)

257 (90.81 %)

93 (91.18 %)

164 (90.61 %)

19 (100 %)

Concurrent

466 (38.93 %)

114 (40.28 %)

30 (29.41 %)

84 (46.41 %)

3 (15.79 %)

Adjuvant

493 (41.19 %)

125 (44.17 %)

37 (36.27 %)

88 (48.62 %)

11 (57.89 %)

  1. NPC = Nasopharyngeal carcinoma; MSI = Masticator space Involvement; MPM = Medial pterygoid muscle; LPM = Lateral pterygoid muscle; ITF = infra temporal fossa
  2. aNumbers in parentheses are percentages
  3. bThe 3rd edition of World Health Organization (WHO) classification of pathological feature in 2003
  4. cStaging system and definitions of TNM classification were according to the seventh edition of the American Joint Committee on Cancer (AJCC) Classification [13]
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Radiation Oncology

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