Question

In laparoscopic (TAPP/TEP) inguinal hernia repair, what is the minimum distance of dissection below the inguinal ligament required to adequately expose the entire myopectineal orifice of Fruchaud?

• A. 0.5 cm
• B. 1 cm
• C. 2 cm
• D. 10 cm

Hint:

Think of the clearance needed to flatten mesh over the femoral defect, not the whole space.

Answer 1

The Correct Option is C

Step 1: Understand the goal of dissection. In laparoscopic groin hernia repair, the mesh must cover the entire myopectineal orifice of Fruchaud, which spans the indirect, direct and femoral defects. Adequate clearance of the preperitoneal space (Bogros and Retzius spaces) is essential so the mesh lies flat and overlaps all potential hernia sites.

Step 2: Define the lower limit of dissection. The peritoneum must be dissected and reduced sufficiently below the inguinal ligament to expose Cooper's ligament and the femoral region. The accepted teaching is that dissection should extend at least 2 cm below the inguinal ligament / pubic tract to clearly visualise the myopectineal orifice and allow the lower mesh edge to sit without rolling up.

Step 3: Apply the standard. A clearance of about 2 cm below the inguinal ligament ensures the femoral orifice and Cooper's ligament are fully seen and covered, preventing recurrence at the inferior margin.

Step 4: Eliminate the others. 0.5 cm and 1 cm are insufficient and risk leaving the femoral defect uncovered, leading to mesh roll-up and recurrence. 10 cm is excessive, unnecessary and increases the risk of injury to the "triangle of pain" and "triangle of doom" structures.

Key fact: A minimum of 2 cm of dissection below the inguinal ligament is needed to adequately expose the myopectineal orifice in laparoscopic hernia repair.