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Table 1 Patient demographics and clinical characteristics

From: Epidermal growth factor receptor and epididymis invasion as prognostic biomarkers in clinical stage I testicular germ cell tumours

Variable   Surveillance group (N = 56) No (%)
Age-years
 Median 30
 Standard deviation 8.5
Histology
  Seminoma 27 (48.2)
  Pure EC 10 (19.6)
  Pure Yolk Sac tumor 1 (1.9)
  Mixed tumor 18 (32.1)
Tumor diameter
 ≥4 cm 26 (46.4)
 <4 cm 27 (48.2)
 Unknown 3 (5.4)
Vascular and lymph vessels invasion
 Yes 16 (28.6)
 No 38 (67.8)
 Unknown 2 (3.6)
Presence of EC
 ≥50% 22 (39.2)
 <50% 33 (58.9)
 Unknown  1 (1.9)
Rete testis invasion
 Yes 18 (32.1)
 No 34 (60.7)
 Unknown 4 (7.1)
Epididymis invasion
 Yes 8 (14.3)
 No 48 (85.7)
 Unknown 0 (0)
Stage
 IA 27 (48.2)
 IB 11 (19.6)
 IS 17 (30.3)
Unknown 1 (1.9)
  1. EC embryonal carcinoma