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Table 1 Summary of results and clinicopathological characteristics of GI-NEN cases examined in this study

From: O6-methylguanine DNA methyltransferase and glucose transporter 2 in foregut and hindgut gastrointestinal neuroendocrine neoplasms

Patient characteristics of neuroendocrine tumor
 Total number 70
 Sex, male/female 42/28
 Median age in years (range) 60 (33–82)
 Grade (WHO 2019) NET-G1, n = 49; NET-G2, n = 19; NET-G3, n = 2
 Primary lesion of NET Foregut, n = 33; Hindgut, n = 37
 Case of lymph node metastasis in NET G1 Metastatic (pathologically), n = 5; Not detected (clinically), n = 20;Not detected (pathologically), n = 10; Unclarified, n = 14
 MGMT score Score0, n = 1; Score1, n = 15; Score2, n = 15; Score3, n = 39
 GLUT2 score Score0, n = 21; Score1, n = 10; Score2, n = 18; Score4, n = 18; Score6, n = 3
 MGMT methylation specific PCR Negative, n = 35; Positive, n = 0; Not examined, n = 35
 Median Ki-67 labeling indexa (range) 1.89 (0.33–48.3)
Patient characteristics of neuroendocrine carcinoma
 Total number 14
 Sex, male/female 10/4
 Median age in years (range) 70 (60–86)
 Primary lesion of NEC Foregut, n = 10; Hindgut, n = 4
 MGMT score Score0, n = 1; Score1, n = 0; Score2, n = 4; Score3, n = 9
 MGMT methylation specific PCR Negative, n = 12; Positive, n = 2
  1. aRound the fourth digit