Doppler
of Undescended Testis
 |
Fig. 14.15. Gray scale image shows Empty right scrotal sac and testis in right inguinal region
s/o Undescended testis |
Undescnded testis (Fig. 14.15) is the
most common congenital abnormality found in about 1 percent of boy and men and
it occurs due to pathological impairment of hypothalamo pituitary gonadal axis.
The incidence of malignancies encountered in this testis is up to 45-48 times
higher than the general population and are also more prone to rupture, torsion
and infertility. If repaired before 5 years of age, the risk for malignancy
drops significantly. Fortunately most of the andescended testis are located in
superficial soft tissue or inguinal canal and are readily detected in about 97 percent
of cases. The search usually begins from the scrotum upward. The undescended
testis is a small oval structures, may be slightly hypoechoic or isoechoic to
the rarenchyma of normal testis. The undescended testis cannot be imaged if located
in the abdominal cavity. Confusion with an enlarged lymph node in the inguinal
region may be avoided by noting following points:
* Enlarged node is hypervascular as compared to virtual
undescended testis.
* Lymph nodes are fairly fixed in position as compared to
mobile undescended
testis.
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