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Table 2 Comparison between the four borders of the ring of the indirect umbilical hernia as regard the predominance of the transverse collagen fibres (number of cases)

From: Structure of direct and indirect umbilical hernia and the implication on surgical repair in children

Borders Transverse collagen fibres
Upper 11 (36%)
Lower 8 (26%)
Right 21 (70%)
Left 21 (70%)