Inguinal Hernia Location: Anatomy of the Inguinal Region

An inguinal hernia occurs in the inguinal region, not the abdominocrural (femoral) crease. Understanding the anatomy clarifies this distinction.

Anatomical Boundaries of the Inguinal Region

• Superior: Inguinal ligament (Poupart's ligament) — runs from anterior superior iliac spine (ASIS) to pubic tubercle.
• Inferior: Femoral ligament (inguinal ligament's inferior reflection) and femoral canal.
• Medial: Rectus abdominis muscle and linea alba.
• Lateral: Anterior superior iliac spine and iliopsoas muscle.
• Floor: Transversalis fascia, reinforced medially by conjoint tendon (internal oblique + transversus abdominis aponeuroses).

Inguinal Canal

The inguinal canal runs obliquely through the inguinal region, parallel to and just above the inguinal ligament. It transmits:

• Males: Spermatic cord (vas deferens, testicular vessels, cremasteric vessels, genital branch of genitofemoral nerve), ilioinguinal nerve.
• Females: Round ligament of uterus, ilioinguinal nerve.

Types of Inguinal Hernias

• Indirect (congenital): Enters internal inguinal ring (lateral to inferior epigastric vessels), traverses canal, may exit external ring into scrotum/labia.
• Direct (acquired): Protrudes through weakened floor of canal (Hesselbach's triangle) medial to inferior epigastric vessels; rarely enters scrotum.

Femoral Hernia (Different Location)

Occurs below the inguinal ligament, through the femoral canal (medial to femoral vein). More common in women; higher strangulation risk.

Clinical examination (standing, Valsalva) and imaging (ultrasound, CT) distinguish hernia type and location for appropriate surgical planning.