A<unk>  is an accumulation of clear fluid in the tunica vaginalis, the most internal of membranes containing a<unk> le. A primary<unk>  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<unk>  is secondary to either inflammation or a neoplasm in the<unk> .
A<unk>  usually occurs on one side. The accumulation can be a marker of physical trauma, infection or tumor, but the cause is generally unknown.
Hydrocele testis
Testicular cyst
Spermatocele
Scrotal cyst
Cystocele
Testicular torsion
Inguinal hernia
Pneumatocele