Which structures form the lateral boundary of Hesselbach's triangle?

Which structures form the lateral boundary of Hesselbach's triangle?

• A. Inferior epigastric artery and vein
• B. Superior epigastric vessels
• C. Deep circumflex iliac vessels
• D. Femoral vessels

Answer: (A)

Hesselbach's triangle marks a weak area in the anterior abdominal wall where direct inguinal hernias can protrude. Its lateral boundary is formed by the inferior epigastric vessels, which rise from the external iliac vessels and course medially along the inner surface of the lower abdominal wall, creating the border between the rectus abdominis medially and the inguinal region laterally. The other boundaries are the medial edge of the rectus abdominis, the inguinal ligament inferiorly, and the floor formed by the conjoint tendon. This arrangement also explains why direct hernias occur medial to the inferior epigastric vessels, while indirect hernias pass lateral to them through the deep inguinal ring. The superior epigastric vessels stay within the rectus sheath and do not define this lateral border, the deep circumflex iliac vessels run more laterally along the iliac crest, and the femoral vessels lie below the inguinal ligament in the femoral triangle.

Hesselbach's triangle marks a weak area in the anterior abdominal wall where direct inguinal hernias can protrude. Its lateral boundary is formed by the inferior epigastric vessels, which rise from the external iliac vessels and course medially along the inner surface of the lower abdominal wall, creating the border between the rectus abdominis medially and the inguinal region laterally. The other boundaries are the medial edge of the rectus abdominis, the inguinal ligament inferiorly, and the floor formed by the conjoint tendon. This arrangement also explains why direct hernias occur medial to the inferior epigastric vessels, while indirect hernias pass lateral to them through the deep inguinal ring. The superior epigastric vessels stay within the rectus sheath and do not define this lateral border, the deep circumflex iliac vessels run more laterally along the iliac crest, and the femoral vessels lie below the inguinal ligament in the femoral triangle.