Swelling in the right groin

A 30-year-old male presents with pain and swelling in the right groin. Examination suggests a femoral hernia. Which of the following anatomical structures forms the medial boundary of the femoral ring?

A) Femoral vein
B) Inguinal ligament
C) Lacunar ligament
D) Pectineal ligament

Answer: C) Lacunar ligament

Explanation:
The femoral ring is the entrance to the femoral canal, and its boundaries are:

• Medially: Lacunar ligament
• Laterally: Femoral vein
• Anteriorly: Inguinal ligament
• Posteriorly: Pectineal ligament

Femoral hernias pass through the femoral ring and are at high risk of strangulation due to the rigid surrounding structures.