Hydrocele Testis
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Hydrocele Testis
Hydrocele testis
The right testis, exposed by laying open the tunica vaginalis. (Tunica vaginalis is labeled at upper right.)

A hydrocele testis is an accumulation of clear fluid within the cavum vaginale, the potential space between the layers of the tunica vaginalis of the testicle. A primary hydrocele causes a painless enlargement in the scrotum on the affected side and is thought to be due to the defective absorption of fluid secreted between the two layers of the tunica vaginalis (investing membrane). A secondary hydrocele is secondary to either inflammation or a neoplasm in the testis.

A hydrocele usually occurs on one side, but can also affect both sides. The accumulation can be a marker of physical trauma, infection, tumor or varicocele surgery,[1] but the cause is generally unknown. Indirect inguinal hernia indicates increased risk of hydrocele.

Hydroceles are more common in boys than girls. A hydrocele is normally seen in infant boys as an enlarged scrotum. In infant girls it appears as enlarged labia.

Signs and symptoms

A hydrocele feels like a small fluid-filled balloon inside the scrotum. It is smooth, and is mainly in front of the testis. Hydroceles vary greatly in size and are typically painless and harmless. However, as the fluid continues to accumulate and the scrotum further enlarges, more discomfort can be expected. Large hydroceles will cause discomfort because of their size. Sometimes pain can be in both testicles as pressure from the enlarged area puts pressure against the unaffected area which can cause discomfort to the normal testicle. It has also been found to decrease a man's sex drive and makes him less active for fear of enlarging the mass. As the fluid of a hydrocele is transparent, light shone through the hydrocelic region will be visible from the other side. This phenomenon is called transillumination.[]

Symptoms of a hydrocele can easily be distinguished from testicular cancer, as a hydrocele is soft and fluid-filled, whereas testicular cancer feels hard and rough.[]


A hydrocele testis is not generally thought to affect fertility. However, it may be indicative of other factors that may affect fertility.[]


During embryogenesis, the testis descends through the inguinal canal, drawing a diverticulum of peritoneum into the scrotum as it descends. This peritoneal tissue is known as the processus vaginalis. Normally, the communication between the processus vaginalis and the peritoneum is obliterated, and the tunica vaginalis is the tissue that remains overlying the testis and the epididymis. Congenital hydrocele results when the processus vaginalis remains, allowing fluid from the peritoneum to accumulate in the scrotum.[]


Scrotal ultrasound of a 1 dm large hydrocele, with anechoic (dark) fluid surrounding the testicle.
Communicating hydrocele, caused by the failure of the processus vaginalis closure.

Through diagnostic ultrasound the accumulation of fluids can be diagnosed correctly.[]


The fluid accumulation can be drained by aspiration, but this may be only temporary. A more permanent alternative is a surgical procedure, generally, an outpatient ambulatory (same-day) procedure, called a hydrocelectomy. There are two surgical techniques available for hydrocelectomy.[]

Hydrocelectomy with Excision of the Hydrocele Sac
Incision of the hydrocele sac after complete mobilization of the hydrocele. Partial resection of the hydrocele sac, leaving a margin of 1-2 cm. Care is taken not to injure testicular vessels, epididymis or ductus deferens. The edge of the hydrocele sac is oversewn for hemostasis (von Bergmann's technique) or the edges are sewn together behind the spermatic cord (Winkelmann's or Jaboulay's technique). Hydrocele surgery with excision of the hydrocele sac is useful for large or thick-walled hydroceles and multilocular hydroceles.[]
Hydrocele Surgery with Plication of the Hydrocele Sac
The hydrocele is opened with a small skin incision without further preparation. The hydrocele sac is reduced (plicated) by suture Hydrocele surgery: Lord's technique. The plication technique is suitable for medium-sized and thin-walled hydroceles. The advantage of the plication technique is the minimized dissection with a reduced complication rate.[2]

If the hydrocele is not surgically removed, it may continue to grow. The hydrocele fluid can be aspirated. This procedure can be done in a urologist's office or clinic and is less invasive but, recurrence rates are high.[3] Sclerotherapy, the injection of a solution following aspiration of the hydrocele fluid may increase success rates.[4] In many patients, the procedure of aspiration and sclerotherapy is repeated as the hydrocele recurs.[5]


  1. ^ C, Esposito (2004). "Incidence and management of hydrocele following varicocele surgery in children". J Urol. 171 (3): 1271-3. doi:10.1097/01.ju.0000112928.91319.fe. PMID 14767329.
  2. ^ Ku u.a. 2001 KU, J. H.; KIM, M. E.; LEE, N. K.; PARK, Y. H.:The excisional, plication and internal drainage techniques: a comparison of the results for idiopathic hydrocele.In: BJU Int 87 (2001), Nr. 1, S. 82-4
  3. ^ Fracchia, JA; Armenakas, NA; Kohan, AD (1998). "Cost-effective hydrocele ablation". The Journal of Urology. 159 (3): 864-7. doi:10.1016/S0022-5347(01)63755-8. PMID 9474170.
  4. ^ Beiko, DT; Kim, D; Morales, A (2003). "Aspiration and sclerotherapy versus hydrocelectomy for treatment of hydroceles". Urology. 61 (4): 708-12. doi:10.1016/S0090-4295(02)02430-5. PMID 12670550.
  5. ^ Shan, CJ; Lucon, AM; Arap, S. (2003). "A Comparative study of sclerotherapy with phenol and surgical treatment for hydrocele". J Urol. 169 (3): 1056-9. doi:10.1097/01.ju.0000052680.03705.40. PMID 12576845.

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