Regarding the anatomy of the femoral triangle, all of the following statements are correct EXCEPT:

Explanation

## Anatomy of the Femoral Triangle ### Boundaries and Floor The femoral triangle is a superficial anatomical space in the upper medial thigh bounded by: - **Medial border:** medial edge of adductor longus ✓ - **Lateral border:** medial edge of sartorius ✓ - **Superior border (base):** inguinal ligament **High-Yield:** The **floor** of the femoral triangle is formed by: - **Iliopsoas** (laterally) - **Pectineus** (medially) The **vastus medialis** and **adductor longus** do NOT form the floor of the femoral triangle. Adductor longus forms the medial border, and vastus medialis is not a boundary or floor component. This makes option A **incorrect** and therefore the answer to this "EXCEPT" question. ### Contents and Relationships **Key Point:** The femoral vessels lie within the femoral sheath, which is a downward continuation of the fascia transversalis (anteriorly) and iliopsoas fascia (posteriorly). **High-Yield:** Within the femoral sheath, the arrangement from **lateral to medial** is: 1. Femoral **artery** (lateral compartment) 2. Femoral **vein** (intermediate compartment) 3. Femoral **canal** with lymphatics/lymph nodes (medial compartment — the femoral canal) The femoral **nerve** lies **outside** the sheath, lateral to it. **Clinical Pearl:** The mnemonic **NAVY** (from lateral to medial: Nerve–Artery–Vein–Y-fronts/lymphatics) helps recall the arrangement at the femoral triangle. The artery lies **lateral** to the vein — option D correctly states the artery is medial to the vein is FALSE, making D a true incorrect statement; however, option A is also incorrect because vastus medialis is not part of the floor. ### Why Option A is the Best Answer Per standard anatomical texts (Gray's Anatomy, Snell's Clinical Anatomy), the floor of the femoral triangle is formed by **iliopsoas laterally** and **pectineus medially**. Adductor longus forms the medial border (not the floor), and vastus medialis plays no role in forming the femoral triangle's floor. Option A is therefore the false statement among the choices. ### Summary Table | Structure | Location | |-----------|----------| | Femoral nerve | Lateral to sheath (outside) | | Femoral artery | Lateral compartment of sheath | | Femoral vein | Intermediate compartment of sheath | | Femoral canal | Medial compartment (lymphatics) | | Floor (lateral) | Iliopsoas | | Floor (medial) | Pectineus |