The deep inguinal ring is a deficiency in which structure, and what is its surface marking?

• A Transversus abdominis aponeurosis; located at the midpoint of the inguinal ligament
• B External oblique aponeurosis; located lateral to the pubic tubercle
• C Internal oblique muscle; located above the lateral inguinal triangle
• D Transversalis fascia; located 1.25 cm above the midpoint of the inguinal ligament (mid-inguinal point) ✓

Explanation

The deep (internal) inguinal ring is an oval deficiency in the transversalis fascia, situated approximately 1.25 cm (0.5 inches) above the midpoint of the inguinal ligament (mid-inguinal point — midpoint between ASIS and pubic symphysis). This is lateral to the inferior epigastric vessels (which define the medial boundary of the deep ring). In contrast, the superficial (external) inguinal ring is a triangular deficiency in the external oblique aponeurosis, just above and lateral to the pubic tubercle. The distinction between the two rings is crucial for classifying direct versus indirect inguinal hernias.

Reference: BD Chaurasia's Human Anatomy, 8th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.