A Spigelian hernia protrudes through the Spigelian aponeurosis. At which specific anatomical point is it most frequently found?
- A At the level of the umbilicus through the linea alba
- B Along the lateral border of the rectus abdominis, between the arcuate line and the umbilicus ✓
- C Through the femoral canal below the inguinal ligament
- D Through the lumbar triangle of Petit
Correct answer: B. Along the lateral border of the rectus abdominis, between the arcuate line and the umbilicus
Explanation
Spigelian hernias protrude through the Spigelian fascia (aponeurosis of the transversus abdominis) at the lateral border of the rectus sheath. The majority (90%) occur in the 'Spigelian hernia belt' — a transverse zone between the level of the umbilicus and the anterior superior iliac spine, where the posterior rectus sheath is absent below the arcuate line, making the fascia less supported. They are difficult to detect clinically as they are often intramural (between abdominal muscle layers).
Reference: Bailey & Love's Short Practice of Surgery, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.