MALE-TESTIS and EPIDIDYMIS INFLAMMTION and CONGENITAL PROBLEM Flashcards
Testis and Epididymis
Distinct pathological conditions affect the testis and epididymis.
In the epididymis, the most
important and frequent conditions are ____________,
- inflammatory diseases
whereas in the testis the major
lesions are__________
tumors.
T for T!!!!!
CONGENITAL ANOMALIES
Cryptorchidism
With the exception of undescended testes (cryptorchidism), congenital anomalies are extremely
rareandinclude absence of one or both testes and fusion of the testes (so-called synorchism).
synorchism
- *___________is found in approximately 1% of 1-year-old boys.** [67] This anomaly represents a
- *complete or incomplete failure** of the intra-abdominal testes to descend into the scrotal sac
. It
usually occurs as an isolated anomaly but may be accompanied by other malformations of the
genitourinary tract, such as hypospadias.
Cryptorchidism
Creepy d bumaba un testis
1 %
1 year old
Testicular descent occurs in two morphologically and hormonally distinct phases. [68]
During
- the first, the transabdominal, phase, the testis comes to lie within the lower abdomen or brim of the pelvis.
- In the second, or the inguinoscrotal, phase, the testes descend through the inguinal canal into the scrotal sac.
During
the_______________, the testis comes to lie within the lower abdomen or brim of
the pelvis.
This phase is believed to be controlled by a hormone called müllerian-inhibiting
substance.
first, the transabdominal, phase
In the _____________, the testes descend through the inguinal canal into the scrotal sac.
This phase is androgen dependent and is possibly mediated by
androgen-induced release of calcitonin gene–related peptide,from thegenitofemoral nerve.
second, or the inguinoscrotal, phase
Although testes may be arrested anywhere along their pathway of descent, defects in
transabdominal descent are uncommon, accounting for approximately 5% to 10% of cases
. In
most patients the undescended testis is palpable in the inguinal canal.
Even though testicular
descent is controlled by hormonal factors, cryptorchidism is only rarely associated with a welldefined
hormonal disorder.
The condition is completely asymptomatic, and it is found by the
patient or the examining physician only when the scrotal sac is discovered not to contain the
testis.
Cryptorchidism is unilateral in most cases, but it may be bilateral in 25% of
patients
Histologic changes in the malpositioned testis begin as early as 2 years of age.
They are characterized by an_________________( Fig. 21-20
).
- ** arrest in the development of germ cells**
- associated with marked hyalinization and thickening of the basement membrane of the **spermatic tubules **
- Eventually the tubules appear as dense cords of hyaline connective tissue outlined by prominent basement membranes.
- There is concomitant increase in interstitial stroma.
Because Leydig cells are spared, they appear to be prominent.
As might be expected with
progressive tubular atrophy, the cryptorchid testis is small in size and is firm in consistency as
a result of____________
Histologic deterioration, associated with a paucity of germ cells,
has also been noted in the contralateral (descended) testis in males with unilateral
cryptorchidism, supporting an intrinsic defect in testicular development.
fibrotic changes.
In addition to sterility, cryptorchidism can be associated with other morbidity.
When the testis lies in the inguinal canal, it is particularly exposed to trauma and crushing against the ligaments and
bones.
A concomitant ____________ accompanies the undescended testis in about 10% to 20% of cases
inguinal hernia
. In addition, the undescended testis is at a greater risk of developing____________ than is the descended testis. [69] During the first year of life the majority of inguinal
cryptorchid testes descend spontaneously into the scrotum. Those that remain undescended
require surgical correction, preferably before histologic deterioration sets in at around 2 years
of age. [70]
testicular cancer
_____________does not guarantee fertility; deficient
spermatogenesis has been reported in 10% to 60% of patients in whom surgical repositioning
was performed. [67,] [70]
To what extent the risk of cancer is reduced after orchiopexy is also
unclear.
According to some studies, orchiopexy of unilateral cryptorchidism before 10 years of age protects against cancer development. [71] This is not universally accepted, however. [72]
Orchiopexy (placement in the scrotal sac)
Malignant change may occur in the_____________.
These
observations suggest that cryptorchidism is associated with a defect in testicular development
and cellular differentiation that is unrelated to anatomic position.
contralateral, normally descended testis
REGRESSIVE CHANGES
- Atrophy
- and Decreased Fertility
Atrophy is a regressive change that affects the scrotal testis and can have any of several
causes, including
(1) progressive atherosclerotic narrowing of the blood supply in old age,
(2) the end stage of an inflammatory orchitis
(3) cryptorchidism,
(4) hypopituitarism,
(5) generalized malnutrition or cachexia,
(6) irradiation,
(7) prolonged administration of
antiandrogens (treatment for advanced carcinoma of the prostate), and
(8) exhaustion atrophy, which may follow the persistent stimulation produced by high levels of follicle-stimulating pituitary hormone.
The gross and microscopic alterations follow the pattern already described
for cryptorchidism.