In laparoscopic totally extraperitoneal (TEP) repair of an inguinal hernia, which key anatomical landmark — the triangle of doom — must be avoided when placing staples/tacks to prevent catastrophic vascular injury?
- A The triangle between the inferior epigastric vessels medially and the testicular vessels laterally, through which the external iliac vessels pass ✓
- B The space of Bogros containing lymphatic vessels
- C Hesselbach's triangle bounded by the rectus, inferior epigastric, and inguinal ligament
- D The corona mortis area where obturator and external iliac vessels communicate
Correct answer: A. The triangle between the inferior epigastric vessels medially and the testicular vessels laterally, through which the external iliac vessels pass
Explanation
In TEP/TAPP repair, the 'triangle of doom' is bounded medially by the vas deferens and laterally by the testicular (gonadal) vessels — within this triangle run the external iliac artery and vein. Stapling or tacking in this zone risks catastrophic external iliac vascular injury. The adjacent 'triangle of pain' (lateral to the testicular vessels) contains the lateral femoral cutaneous nerve and genitofemoral nerve, where stapling causes chronic neuralgia. Recognising both triangles is essential for safe laparoscopic hernia repair.
Reference: Bailey & Love's Short Practice of Surgery, 27th ed.
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Written and medically reviewed by the StethoPrep medical team.