Femoral triangle

Jacob Lau and Dr Henry Knipe et al.

The femoral triangle is an anatomical space in the anterior upper thigh that contains several palpable structures.

Gross anatomy


The major boundaries can be recalled with the mnemonic SAIL 1,2:


From lateral to medial 1:

The basic order can be recalled with the mnemonics seen here.

Radiographic features


The femoral triangle is best seen on coronal reformats but because of its curved nature around the anterior thigh it cannot always be fully seen. Cherian and Parnell 2 have proposed a radiologic femoral triangle (as opposed to the above described anatomic femoral triangle) with the following boundaries:

  • laterally: femoral vein
  • medially: pectineus muscle
  • superiorly: inguinal ligament

Cherian and Parnell state that the importance of the radiologic femoral triangle is that it is a site for femoral hernias identifiable on MDCT and acts as a surrogate site for the femoral canal 2

Anatomy: Lower limb

Anatomy: Lower limb

Article information

rID: 23387
Section: Anatomy
Synonyms or Alternate Spellings:
  • Radiologic femoral triangle

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Cases and figures

  • Figure 1: boundaries
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  • Figure 2: contents
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  • Figure 3: Gray's illustration
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