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The clinical anatomy of the triangle of Petit
M Loukas1, R S Tubbs, A El-Sedfy
1Department of Anatomical Sciences, St. George's University, Grenada, West Indies.
Introduction:
Hernias through the triangle of Petit (TP) are uncommon. The anatomy of the TP is known to be variable, yet quantitative data are scant.
Materials And Methods:
The triangle was observed in 80 adult cadavers and its dimensions and surface area were measured.
Results:
On the basis of surface area we classified the triangles into four types. Type I or small TP, with a surface area of <8 cm2, accounted for 43.7% of our specimens. Type II (26.2%) were intermediate in size, with a surface areas of 8-12 cm2. Type III (12.5%) were large triangles with surface areas >12 cm2. Finally, Type IV (17.5%) were not triangles. In these, the latissimus dorsi was covered by the external abdominal oblique muscle.
Conclusions:
We hope these data will help prediction of which patients are at greater risk of herniation through the TP.
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