Ligament
Internal spermatic fascia
A transversalis-fascia extension around the spermatic cord
High-yield
Deep ring → transversalis fascia → internal spermatic fascia. The tunica vaginalis is a separate serosal covering deeper around the testis.
Overview
At the deep inguinal ring, transversalis fascia continues onto the spermatic cord as internal spermatic fascia. It forms the deepest named spermatic covering and extends toward the testis outside the tunica vaginalis. The cremasteric layer lies superficial to it.
Reference facts
- Attachments
- Continuous with transversalis fascia at the deep inguinal ring and extending around the cord toward the testis.
- Function
- Provides the deepest spermatic fascial investment around ductal, vascular and neural cord structures.
- Clinical point
- Lies outside the peritoneal sac of an indirect hernia; it should not be described as the lining of that sac.
Clinical correlation
An indirect hernia enters through the deep ring and follows the cord within its coverings. Internal spermatic fascia invests the hernia's route; the hernia sac itself is peritoneum.
Frequently asked questions
Where does the internal spermatic fascia attach?
The internal spermatic fascia attaches continuous with transversalis fascia at the deep inguinal ring and extending around the cord toward the testis.
What does the internal spermatic fascia do?
Provides the deepest spermatic fascial investment around ductal, vascular and neural cord structures.
Why does the internal spermatic fascia matter clinically?
Lies outside the peritoneal sac of an indirect hernia; it should not be described as the lining of that sac.