Tunica vaginalis

Tunica vaginalis is a pouch of serous membrane that covers the front and sides of the testicle. It is derived from the processus vaginalis of the peritoneum, which in the fetus precedes the descent of the testes from the abdomen into the scrotum. After the testis has descended, the processus vaginalis is obliterated above and remains as the tunica vaginalis.

Structure

The tunica vaginalis is a serous sac, consisting of a visceral and a parietal lamina. The visceral lamina covers the greater part of the testis and epididymis, connecting the latter to the testis by means of a distinct fold. The parietal lamina is far more extensive than the visceral, extending upward for some distance in front and on the medial side of the cord, and reaching below the testis.

Clinical significance

The tunica vaginalis may be affected by various medical conditions, including hydrocele and hematocele. A hydrocele is an abnormal accumulation of serous fluid in the cavity of the tunica vaginalis, while a hematocele is a collection of blood within the same cavity. Both conditions may cause swelling and discomfort in the scrotum.

See also

• Testicle
• Scrotum
• Hydrocele
• Hematocele

References

Tunica vaginalis Resources
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