Table 2 Relationship between nuclear MED7 protein (IHC) and clinicopathological parameters of the Nottingham BC series

From: Mediator complex (MED) 7: a biomarker associated with good prognosis in invasive breast cancer, especially ER+ luminal subtypes

Clinicopathological Criteria

MED7 nuclear staining

χ2 (p-Value)

 

Low (%)

High (%)

 

Age at diagnosis

  ≤50

220 (48.6)

233 (51.4)

0.781 (0.381)

  >50

423 (51.1)

404 (48.9)

 

Tumour size (cm)

  ≤2.0

274 (44.1)

348 (55.9)

19.09 (<0.0001)

  >2.0

366 (56.3)

284 (43.7)

 

Histological grade

  1

82 (39.8)

124 (60.2)

49.341 (<0.0001)

  2

174 (40.8)

252 (59.2)

 

  3

383 (60.2)

253 (39.8)

 

Tubule formation

  1

26 (39.4)

40 (60.6)

15.589 (0.0004)

  2

185 (43.8)

237 (56.2)

 

  3

406 (54.6)

338 (45.4)

 

Nuclear pleomorphism

  1

8 (26.7)

22 (73.3)

29.894 (<0.0001)

  2

195 (41.9)

270 (58.1)

 

  3

413 (56.2)

322 (43.8)

 

Mitotic score

  1

164 (39.8)

248 (60.2)

43.005 (<0.0001)

  2

110 (44.4)

138 (55.6)

 

  3

343 (60.0)

229 (40.0)

 

Tumour type

  Ductal

551 (51.6)

516 (48.4)

20.575 (0.001)

  Lobulara

41 (35.3)

75 (64.7)

 

  Medullary like

22 (75.9)

7 (24.1)

 

  Special type

22 (42.3)

30 (57.7)

 

Lymph node stageb

  I

398 (51.1)

381 (48.9)

1.853 (0.603)

  II

191 (49.6)

194 (50.4)

 

  III

50 (48.1)

54 (51.9)

 

NPI

  Good prognostic group

157 (40.6)

230 (59.4)

23.546 (<0.0001)

  Moderate prognostic group

358 (53.1)

316 (46.9)

 

  Poor prognostic group

125 (59.2)

86 (40.8)

 

IHC-validated LVI

  Negative

319 (47.5)

352 (52.5)

4.10 (0.04)

  Positive

196 (54.1)

166 (45.9)

 
  1. Significant p-values are highlighted in bold.
  2. aTumour type p-value reflects association between MED7 and lobular tumours
  3. bLymph node stages 1, 2 and 3 refer to the lymph node staging score incorporated in the Nottingham Prognostic Index, routinely used for breast cancer prognostication: 1 refers to no lymph nodes being involved; 2 refers to 1–3 lymph nodes positive, and 3 >3 lymph nodes positive