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Table 4 Probable etiologies in the patients without a history of gastrectomy

From: Oral manifestations in vitamin B12 deficiency patients with or without history of gastrectomy

No

Age (years)

Sex

Symptom duration (months)

Probable etiology of vitamin B12 deficiency

1

63

F

84

Medications for diabetes mellitus and Gastritis

2

67

F

72

Medications for diabetes mellitus

3

73

F

24

Gastritis

4

85

M

12

Medications for diabetes mellitus

5

56

F

16

Gastritis

6

80

F

6

Gastritis

7

60

F

96

Vegetarian diet

8

70

F

18

Gastritis

9

57

M

18

Antibodies to intrinsic factor

10

73

M

60

Early gastric cancer

11

52

M

8

Unknown