Inferior lumbar triangle

Last revised by Henry Knipe on 15 Sep 2021

The inferior lumbar triangle, also known as the Petit triangle, is an anatomical space through which inferior lumbar hernias can occur. It is not to be confused with the adjacent superior lumbar triangle (of Grynfeltt-Lesshaft).

Gross anatomy


Related pathology

History and etymology

The first description of the inferior or superficial lumbar hernia by French surgeon Jean-Louis Petit (1672-1750) in 1738 4,5.

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Cases and figures

  • Figure 1: superior and inferior lumbar triangles
    Drag here to reorder.
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