1831, plural of Modern Latin chelicera, from Greek khele claw, talon, cloven hoof, from PIE *ghel-wo-, from root *ghel-una- jaw, + keras horn (see kerato-). Earlier chelicer (1835), from French chÃ©licÃ¨re.
Testicular diseases can be classified as endocrine disorders or as a disorders of the reproductive system. The testicles are well-known to be very sensitive to impact and injury. Blue balls is a slang term for a temporary fluid congestion in the testicles and prostate region caused by prolonged sexual arousal. The most prominent diseases of testicles are: 1  testicular cancer and other neoplasms. 2  swelling of a testicle, caused by hydrocele testis.  inflammation of the testicles, called orchitis.
Primary male hypogonadism is caused by testicular dysfunction that can be congenital or develop later in life. In primary hypogonadism, the testicles do not respond to hormone stimulation. This can be due to a congenital disorder such as Klinefelter's syndrome, or acquired as a result of radiation treatment, chemotherapy, mumps, tumors or trauma to the testes.