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Androgen
Hormone that stimulates development of male secondary sex characteristics, such as beard growth and deepening of voice.
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Anorchism
Congenital absence of one or both testes.
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Aspermia
Failure in a male of production of sperm cells (spermatozoa) as well as ejaculation of semen (fluid and sperm cells).
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Azoospermia
Lack of live spermatozoa in the semen.
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Balanitis
Inflammation of the glans penis.
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Bulbourethral gland
One of a pair of exocrine glands, located on either side of the male urethra, gland just below the prostate gland. It secretes fluid that is part of semen; Cowper gland.
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Castration
Removal of sex glands (gonads); ovaries or testes.
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Chancre
Primary lesion of syphilis; a hard ulcer occurring at the site of entry of the bacterial infection and most frequently on the external genitalia of a male or female.
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Chlamydia
Sexually transmitted bacterial infection that invades the male urethra and female vagina and cervix.
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Circumcision
Surgical removal of the foreskin (prepuce) surrounding the end of penis.
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Cowper gland
Bulbourethral gland.
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Cryogenic surgery
Use of extremely cold temperatures to freeze or destroy tissue.
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Cryptorchism
One or both testes fail to descend from the abdomen in the scrotal sac near the time of birth.
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Ejaculation
Ejection of sperm and fluid from the male urethra as a result of sexual stimulation.
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Ejaculatory duct
Tube through which semen enters the male urethra.
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Embryonal carcinoma
Malignant tumor of the testes.
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Epididymis
- One of a pair of long, tightly coiled tubes lying on top of each testis.
- It carries sperm cells to the vas deferens.
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Epididymitis
Inflammation of an epididymis.
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Erectile dysfunction
Inability of an adult male to achieve an erection; impotence.
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Eunuch
A male who is castrated before reaching puberty.
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Flagellum
A flagellum is a hair-like projection on a sperm cell that makes it motile.
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Fraternal twins
Two infants born of the same pregnancy from two separate ova and two twins separate sperm cells.
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Glans penis
Sensitive tip (surrounded by foreskin) of the penis.
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Gonorrhea
Sexually transmitted infection involving inflammation of genital tract mucous membranes and caused by gonococci (berry-shaped bacteria).
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Herpes genitalis
Sexually transmitted infection of the skin and mucosa of the genitals caused by the herpes simplex virus and marked by blisters.
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Hydrocele
Hernia (sac of clear, watery fluid) within the scrotum.
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Hypospadias
Congenital anomaly in which the opening of the urethra is on the underside of the penis.
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Identical twins
Two infants resulting from division of one fertilized egg into two separate embryos.
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Impotence
Inability of an adult male to achieve an erection; erectile dysfunction.
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Interstitial cells
In the testes, these cells lie between the seminiferous tubules and produce testosterone.
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Ligation
Tying off a tube or blood vessel. Thread or wire is used.
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Oligospermia
Scanty (less than the normal number of sperm in semen) sperm count.
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Orchiectomy
Removal (excision) of a testis.
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Orchiopexy
Surgical fixation of an undescended testis in the scrotum.
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Orchitis
Inflammation of a testis.
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Parenchyma
Functional, essential tissue of an organ. The seminiferous tubules are the parenchyma of the testis.
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Perineum
In a male, the external area between the anus and scrotum. In a female, the external area between the anus and the vagina.
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Phimosis
Narrowing (stricture) of the opening of the prepuce (foreskin) over the glans penis.
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Photoselective vaporization of the prostate
A minimally invasive surgical procedure for treating benign prostatic hyperplasia in which a green laser light is used to remove prostatic tissue.
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Prepuce
Fold of skin covering the glans penis (tip of the penis); foreskin.
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Prostatectomy
Removal (excision) of the prostate gland.
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Prostate gland
Exocrine gland, in men, at the base of the urinary bladder. It secretes fluid (part of semen) into the urethra during ejaculation.
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Prostatic hyperplasia
Increased growth of the prostate gland in numbers of cells. This is a hyperplasia benign condition (benign prostatic hyperplasia or BPH).
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Prostatitis
Inflammation of the prostate gland.
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Purulent
Pus-filled; forming or containing pus.
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Scrotum
Sac that contains the testes and associated organs.
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Semen
Fluid discharged at ejaculation; consisting of sperm cells and secretions from the prostate gland, seminal vesicles, and bulbourethral glands.
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Seminal vesicle
One of a pair of sac-like male exocrine glands lying behind the urinary vesicle bladder and opening into the vas deferens. It secretes fluid that is the major part of semen.
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Seminiferous tubules
Narrow, coiled tubules that produce spermatozoa in the testes.
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Seminoma
Malignant tumor within a testis.
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Spermatogenesis
Formation of sperm cells.
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Spermatozoon
Single sperm cell.
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Spermolytic
Pertaining to destruction of sperm cells.
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Sterilization
Procedure that removes an individual's ability to produce or release reproductive cells.
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Stroma
Supportive, connective tissue of an organ.
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Syphilis
Sexually transmitted infection caused by bacteria (spirochetes). A chancre (ulcer) on the genitalia is a characteristic lesion.
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Teratoma
Malignant tumor of a testis or ovary; composed of embryonic cells that develop into different types of tissue.
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Testicular
Pertaining to a testis or testicle.
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Testicular torsion
Twisting of the spermatic cord and blood vessels of the testes.
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Testis
Male gonad that produces spermatozoa (sperm cells) and the hormone, testosterone.
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Testosterone
Male hormone secreted by the interstitial cells of the testes.
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Varicocele
Enlarged, dilated veins near a testicle.
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Vas deferens
Narrow tube (one on each side) that carries sperm from the epididymis into the body, around the urinary bladder toward the urethra.
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Vasectomy
Removing a piece of each vas deferens and tying off each end.
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Vasovasostomy
New opening (anastomosis) of the ends of a severed vas deferens. This surgical procedure reverses a vasectomy.
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