993
C h a p t e r
39
he male genitourinary system is subject to a num-
ber of structural and functional disorders, all of
which can affect urine elimination, sexual function,
and fertility. This chapter is divided into three parts:
(1) the physiologic basis of male reproductive function,
including hormone production, spermatogenesis, and
neural control of sexual function; (2) disorders of the
male genitourinary structures, including the penis, scro-
tum and testes, and prostate gland; and (3) disorders
of childhood and changes that occur as a result of the
aging process.
Physiologic Basis of Male
Reproductive Function
The male genitourinary system is composed of the
paired gonads, or testes; genital ducts; accessory geni-
tal organs; and penis (Fig. 39-1). The testes function
in the production of androgens or male sex hormones
and spermatozoa; the ductile system aids in the storage
and transport of spermatozoa; and the accessory geni-
tal organs produce the fluid constituents of semen. The
penis functions in both urine elimination and sexual
function.
Disorders of
the Male
Genitourinary
System
Physiologic Basis of Male Reproductive Function
Testicular Function
Hormone Production
Spermatogenesis
Semen Production
Hypothalamic/Pituitary Control of Testicular
Function
Sexual Function
Neural Control of Male Sexual Function
Erectile Dysfunction
Disorders of the Penis, the Scrotum and Testes,
and the Prostate
Disorders of the Penis
Inflammation and Infection
Peyronie Disease
Priapism
Neoplasms of the Penis
Disorders of the Scrotum and Testes
Disorders of the Testicular Tunica
Testicular Torsion
Epididymitis
Orchitis
Neoplasms of the Scrotum and Testes
Disorders of the Prostate
Prostatitis
Benign Prostatic Hyperplasia
Cancer of the Prostate
Disorders in Childhood and Aging
Disorders of Childhood
Hypospadias and Epispadias
Phimosis and Paraphimosis
Cryptorchidism
Changes Related to Aging
T
Genitourinary
and Reproductive
Function
11
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