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Table 1 Distribution of published cases of FIF by site of occurrence (1806 to July 2008)

From: Orocervical foetus-in-foetu with prenatal sonographic diagnosis: a case report

Site of occurrence

Frequency (n)

Percentage (%)

Valid percentage (%)

Intra-abdominal

94

55.3

80.3

Intracranial

12

7.1

10.1

Chest

3

1.8

2.5

Neck

3

1.8

2.5

Mouth

3

1.8

2.5

Scrotal sac

3

1.8

2.5

Sacral/pelvis

1

0.6

0.6

Missing*

51

30

100

Total

170

100

-

  1. *Missing is reported cases for which the abstract and the full paper could not retrieved or the abstract contains no information on the site of the FIF.