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Ultrasound image showing tubular ectasia of the rete testis as an incidental finding in an 81 year old male. Rete tubular ectasia, also known as cystic transformation of rete testis [1] is a benign condition, usually found in older men, involving numerous small, tubular cystic structures within the rete testis.
The rete testis does modify the luminal fluids with a limited amount of secretion and reabsorption, but their primary function is to mix and transport the sperm into the efferent ductules, where the major function is reabsorption of about 95% of the fluid, which increases the sperm concentration prior to entering the epididymis.
In the testis, the seminiferous tubules converge to form the rete testes, which is located in the mediastinum testis. The rete testis connects to the epididymal head via the efferent ductules. The epididymis is located posterolateral to the testis and measures 6–7 cm in length.
It supports the rete testis and blood and lymphatic vessels of the testis in their passage into and out of the substance of the gland. [ 3 ] The septa testis - extensions of the tunica albuginea into the substance of the testis that form fibrous partitions - converge towards the mediastinum testis.
The tunica albuginea is a dense, [1] [2] blue-white [3] layer of fibrous tissue surrounding the testis. [1] [4] It is the middle of three envelopes forming the capsule of the testis; it is deep to the visceral layer of tunica vaginalis, and superficial to the tunica vasculosa testis (vascular layer of testis).
Spermatocele is a fluid-filled cyst that develops in the epididymis. [3] The fluid is usually a clear or milky white color and may contain sperm. [4] Spermatoceles are typically filled with spermatozoa [5] and they can vary in size from several millimeters to many centimeters.
The pampiniform plexus (from Latin pampinus 'tendril' and forma 'form') is a venous plexus – a network of many small veins found in the human male spermatic cord, and the suspensory ligament of the ovary.
The tubuli seminiferi recti (also known as the tubuli recti, tubulus rectus, or straight seminiferous tubules) are structures in the testicle connecting the convoluted region of the seminiferous tubules to the rete testis, although the tubuli recti have a different appearance distinguishing them from these two structures.