Urology System Anatomy Guide
Urology System Anatomy Guide
LABORATORY ANATOMY
MEDICAL FACULTY
2017
Editors tim :
A. Ren / Kidney
B. Ureter
C. Vesicaurinaria
D. Urethra
A. REN
B.
a.
c. Skeletopi
a) fascia renalis,
b) capsulaadiposa,
c) capsulafibrosa,
d) corpus adipose
a) Cortex renalis
b) Medulla renalis
c) Pyramidesrenales
d) Papillae renales
e) Columnaerenalis
h) Pelvis renalis
d) Aa. Segmentales
j. Nephron : the smallest structures that can carry out all the
functions of a system
a) Glomerulus
e) Collectives duct
Picture Structure of nephron
C. URETER
a. Position
a) Male : anterior rectum, superior glandula prostat
b) Female : anterior uterus
b. Layers : musculus detrusor vesicae
c. Ostium
a) Ostium ureteris dextra et sinistra (from ureter)
b) Ostium urethrae internum(to urethra)
The triangular area bounded by the openings of the ureters and the
entrance to the urethra makes up a region called the trigoneof the urinary
bladder.
d. Ligamentum
a) Ligamentum umbilicalis medialis
b) Ligamentum umbilicalis mediana
Ligamentum umbilicale
medianum Apex vesicae
Tunica
muscularis
Ostium ureteris
dextra et sinistra
Trigonum vesicae
Ostium urethrae
internum Urethra masculina
pars prostatica
Picture.Vesica Urinaria
E. URETRA
The urethra extends from the neck of the urinary bladder and
transports urine to the exterior of the body.
e) Ur e th ra p a rs sp o n g i osa
Dista 18 20 cm 3-5 cm
nce
Pars 5 -
Clinical application
1. Glomerulonephritis
2. Cystitis
3. Ren Failure
4. Hydronephrosis
Ren
(Glomerulus Proximal convoluted tubule ansa henle / loop henle
Distal convoluted tubule collectives duct papillae renales
calyx minor calyx major pelvis renalis)
Ureter
Ostium urethrae
internum Urethrae Ostium Urethrae Externum
Masculina Reproduction Organ
d. Ductus ejaculatorius
Flow cement to urethrae
e. Urethrae masculina
Divided into 5 parts:
Urethtrae pars intramural
Urethrae pars prostatica
Urethrae pars membranancea
Urethrae pars bulbourethralis
Urethrae pars spongiosa
2. Funiculus spermaticus
3. Accessory Gland
a. Vesicula seminalis
b. Glandula prostat
c. Glandula bulbourethralis
Clinical application :
1. Vasectomy
2. BPH (Benigna Prostat Hyperplasia)
3. Hernia Inguinalis
Vas deferens
1. Vasectomi
B. PARS EXTERNA
a. Cutis
b. M. Dartos
c. Fascia spermatica interna
d. Fascia cremasterica
e. M. Cremaster
f. Fascia spermatica interna
g. Tunica vaginalis testis lamina parietalis (periorchium)
h. Cavum scrotalis
i. Tunica vaginalis testis lamina visceralis (epiorchium)
j. Tunica albuginea
Picture 15. Scrotal layers
2. Penis
Consist of 2 parts:
a. Pars fixata/afixa
1) Crus penis
2) Bulbus penis
b. Pars libera
Consist of 3 parts:
a. Radix penis
b. Corpus penis
c. Glans penis
1. Infection
The bulbourethral glands are the common sites for chronic venereal infection
(e.g., gonorrhoea). The organisms reach the gland by ascending from the bulbous part
of the urethra along the duct of the gland.
Scrotum
1. Hydrocele
This is an accumulation of fluid within the tunica vaginalis. Most hydroceles are
idiopathic, but some may be caused by spread of infection from the testis or
epididymis.
Penis
1. Circumcision
3. Vascularisation of Penis
1. Varicocele
A varicocele is a condition in which the veins of the pampiniform plexus are
elongated and dilated. This is thought to be because the right testicular vein joins the
low-pressure inferior vena cava, whereas the left vein joins the left renal vein, in
which the venous pressure is higher.
2. Malignant tumor of the testis
A malignant tumor of the testis spreads upward via the lymph vessels to the
lumbar (paraaortic) lymph nodes at the level of the first lumbar vertebra. It is only
later, when the tumor spreads locally to involve the tissues and skin of the scrotum,
that the superficial inguinal lymph nodes are involved.
3. Beningn enlargment of the prostate
The cause is possibly an imbalance in the hormonal control of the gland. The
median lobe of the gland enlarges upward and encroaches within the sphincter
vesicae, located at the neck of the bladder. The leakage of urine into the prostatic
urethra causes an intense reflex desire to micturate.
The enlargement of the median and lateral lobes of the gland produces
elongation and lateral compression and distortion of the urethra so that the patient
experiences difficulty in passing urine and the stream is weak. Backpressure effects
on the ureters and both kidneys are a common complication. The enlargement of the
uvula vesicae (owing to the enlarged median lobe) results in the formation of a pouch
of stagnant urine behind the urethral orifice within the bladder.
b. Urethrolithiasis
Urethral calculi are reported to be fairly common in people developing
countries, particularly in the Middle and Far East. They are thought to be
relatively common in childhood in developing countries because of the high
prevalence of bladder calculi, and to occur rarely in women. Most urethral stones
in patients in developing countries are thought to consist of struvite and uric acid,
and of calcium oxalate or cystine in those in developed communities. The anterior
and the posterior urethra are reported as the more common sites of urethral stones
(Kamal et al., 2004).
There are various opinions about the frequency of acute retention of urine
caused by urethral calculi, ranging from very frequent, to infrequent, to not at all.
Some authors consider that urethral stones are usually radiolucent and that a
uroradiographic diagnosis is made in only 40% of cases. There seems to be a
consensus that treatment is essentially based on the size, shape and location of
urethral stones, and on the associated anatomical pathology of the urethra (Kamal
et al., 2004).
(Kamal et al., 2004)
(Akhtar et al., 2012)
c. Vesicolithiasis
Urinary lithiasis affects about 5% of the Western population. The calculi are
formed of calcium in 70% of cases, of uric acid in 20%, of magnesium
ammonium phosphate (struvite) in 10% and of cystine and less than 1%. Urine is
a stable solution and any variation in the degree of saturation, of the urinary pH
and of the concentration of crystallization inhibitors can alter the existing
equilibrium and result in urolithiasis. Bladder stones are rare in developed
countries and in adults they are most commonly associated with bladder outlet
obstruction, chronic infection or the presence of an intravesical foreign body.
They can occur in childhood and are related to malnutrition, especially in a
protein-poor diet. Regarding the clinical presentation, bladder stones may be
asymptomatic. However, symptoms such as suprapubic pain, dysuria, hematuria,
weak and choppy urine stream, hesitancy, frequency, urgency and pain in the
glans may occur in over 50% of patients (Torricelli et al., 2012).
Pathogenesis of bladder stones
1) Adults
Outlet obstruction is the main etiological factor in over 75% of cases of
bladder lithiasis, which provides stasis and infection, change in urinary
pH, urine supersaturation and heterogeneous nucleation, with calculus
formation. This condition usually affects men over 50 years, the benign
prostatic hyperplasia (BPH) being the most common cause, followed by
urethral stricture and adenocarcinoma of the prostate. These calculi are
made of uric acid, calcium oxalate or magnesium ammonium phosphate
(struvite). The latter is associated with infection by bacteria breakers of
urea. Generally, the calculi are unique, but they may be multiple in 25-
30% of cases. Urinary tract infection can be associated with the
pathogenesis of bladder lithiasis in 22-34% of cases, and Proteus sp. is the
most commonly isolated microorganism from urine cultures. Proteus and
some strains of Pseudomonas and E. coli produce urease, which
hydrolyzes urea, resulting in ammonia and carbon dioxide, raising the pH
and promoting urinary supersaturation and precipitation of crystals of
magnesium ammonium phosphate (Torricelli et al., 2012).
2) Children
Nutritional deficiency of vitamin A, magnesium, phosphate and
vitamin B6, associated with low intake of protein and a carbohydrate-rich
diet are implicated in the pathogenesis of pediatric bladder lithiasis.
Furthermore, dehydration, diarrhea, fever and infection may reduce urine
output and increase crystallization. These conditions acidify the urine and
contribute to the formation of bladder stones. The children endemic
vesical lithiasis is commonly associated with uric acid stones, isolated or
associated with calcium oxalate. Nonetheless, calcium phosphate may be
present (Torricelli et al., 2012).
(Cervera and Peri, 2012)
6. Infection
a. Pyelonephritis
Acute pyelonephritis is a potentially organ- and/or life-threatening
infection that often leads to renal scarring. Acute pyelonephritis results from
bacterial invasion of the renal parenchyma. Bacteria usually reach the kidney
by ascending from the lower urinary tract. Bacteria may also reach the kidney
via the bloodstream. Signs and symptoms The classic presentation in patients
with acute pyelonephritis is as follows:
1) Fever - This is not always present, but when it is, it is not unusual
for the temperature to exceed 103F (39.4C)
2) Costovertebral angle pain - Pain may be mild, moderate, or severe;
flank or costovertebral angle tenderness is most commonly
unilateral over the involved kidney, although bilateral discomfort
may be present
3) Nausea and/or vomiting - These vary in frequency and intensity,
from absent to severe; anorexia is common in patients with acute
pyelonephritis
4) Gross hematuria (hemorrhagic cystitis), unusual in males with
pyelonephritis, occurs in 30-40% of females, most often young
women, with the disorder.
Symptoms of acute pyelonephritis usually develop over hours or over
the course of a day but may not occur at the same time. If the patient is male,
elderly, or a child or has had symptoms for more than 7 days, the infection
should be considered complicated until proven otherwise. The classic
manifestations of acute pyelonephritis observed in adults are often absent in
children, particularly neonates and infants. In children aged 2 years or
younger, the most common signs and symptoms of urinary tract infection
(UTI) are as follows:
1) Failure to thrive
2) Feeding difficulty
3) Fever
4) Vomiting
Elderly patients may present with typical manifestations of
pyelonephritis, or they may experience the following:
1) Fever
2) Mental status change
3) Decompensation in another organ system
4) Generalized deterioration (Gupta, 2011).
b. Urethritis
Urethritis is defined as infection-induced inflammation of the urethra.
The term is typically reserved to describe urethral inflammation caused by an
STD, and the condition is normally categorized into either gonococcal
urethritis (GU) or nongonococcal urethritis (NGU).Signs and symptoms
Many patients with urethritis, including approximately 25% of those
with NGU, are asymptomatic and present to a clinician following partner
screening. Up to 75% of women with Chlamydia trachomatis infection are
asymptomatic. Signs and symptoms in patients with urethritis may include the
following:
1) Urethral discharge: May be yellow, green, brown, or tinged with
blood; production unrelated to sexual activity
2) Dysuria (in men): Usually localized to the meatus or distal penis,
worst during the first morning void, and made worse by alcohol
consumption; typically not present are urinary frequency and
urgency
3) Itching: Sensation of urethral itching or irritation between voids
4) Orchalgia: Heaviness in the male genitals
5) Worsens during menstrual cycle (occasionally).
6) Systemic symptoms (eg, fever, chills, sweats, nausea): Typically
absent (Gillespie CW, 2013).
c. Cystitis
Common acute or chronic inflammation of the urinary bladder. The
disease occurs primarily in young women and frequently results from bacterial
invasion of the urethra from the adjacent rectum, most commonly with
normally occurring intestinal bacteria such as E. coli. It is also common in
menopausal women; in them, the bacteria is transmitted from a vagina left
more susceptible to bacterial overgrowth by changes in estrogen levels. In men
cystitis rarely occurs without some other urinary tract disorder, such as kidney
stones or, especially in older men, an enlarged prostate gland. Other
predisposing factors are pregnancy, diabetes, and various systemic disorders.
Symptoms and signs of UTI in the adult are as follows:
1) Dysuria
2) Urinary urgency and frequency
3) A sensation of bladder fullness or lower abdominal discomfort
4) Suprapubic tenderness
5) Flank pain and costovertebral angle tenderness (may be present in
cystitis but suggest upper UTI)
6) Bloody urine
7) Fevers, chills, and malaise (may be noted in patients with cystitis,
but more frequently associated with upper UTI) (P.Lagasse, 2016).
d. Prostatitis
Prostatitis is an infection or inflammation of the prostate gland that
presents as several syndromes with varying clinical features. The term
prostatitis is defined as microscopic inflammation of the tissue of the prostate
gland and is a diagnosis that spans a broad range of clinical conditions.
The National Institutes of Health (NIH) has recognized and defined a
classification system for prostatitis in 1999.The 4 syndromes of prostatitis are
as follows:
7. Trauma
a. Renal injury
(Morey, 2014)
b. Baldder trauma
1) Bladder Contusion
Bladder contusion is an incomplete or partial-thickness tear of the
bladder. This produces a hematoma within the bladder at the location of
injury. Bladder contusion commonly results from blunt trama or extreme
physical activity (eg, long-distance running). Patients typically present
with gross hematuria. On cystography, the bladder usually appears
normal, or it may have a teardrop shape secondary to compression by the
hematoma.
Bladder contusion is relatively benign. It is self-limiting and requires
no specific therapy, except for rest until hematuria resolves. Nevertheless,
it should remain a diagnosis of exclusion. Persistent hematuria or
unexplained lower abdominal pain requires further investigation.
2) Extraperitoneal Bladder Rupture
Traumatic extraperitoneal rupture is usually (89%-100%) associated
with pelvic fracture. Previously, the mechanism of injury was believed to
be direct perforation by bony fragment or disruption of the pelvic girdle. It
is now thought that pelvic fracture is likely coincidental and that bladder
rupture most often is a direct result of deceleration injury and fluid inertia
coupled with the shearing force created by pelvic ring deformation.
Extraperitoneal rupture is usually associated with fracture of the
anterior pubic arch. When this occurs, the anterolateral aspect of the
bladder is typically perforated by bony spicules. Forceful disruption of the
bony pelvis or the puboprostatic ligaments also tears the bladder wall. In
such instances, the degree of bladder injury is directly related to the
severity of the fracture.
A mechanism similar to intraperitoneal bladder rupture is thought to
underly some extraperitoneal bladder injuries. Specifically, this is the
combination of trauma with bladder overdistention, leading to a burst
injury.
The classic cystographic finding is contrast extravasation around the
base of the bladder, confined to the perivesical space. Often, areas of
contrast extravasation shaped like flames, feathers, or starbursts are noted
adjacent to the bladder. Additionally, the bladder may assume a teardrop
shape secondary to compression from a pelvic hematoma.
With a more complex injury, contrast material can extend to the thigh,
penis, perineum, or into the anterior abdominal wall. Extravasation will
reach the scrotum when the superior fascia of the urogenital diaphragm, or
the urogenital diaphragm itself, becomes disrupted.
If the inferior fascia of the urogenital diaphragm is violated, contrast
material will reach the thigh and penis within the confines of the Colles
fascia. Rarely, contrast may extravasate into the thigh through the
obturator foramen or into the anterior abdominal wall through contiguous
tissue planes. Sometimes, extravasation of contrast through the inguinal
canal and into the scrotum or labia majora can occur. See the image
below.
Picture CT scan of extraperitoneal bladder rupture. The contrast extravasates from the
bladder into the prevesical space.
Since urine will generally continue to drain into the abdomen through
the open bladder wall defect, intraperitoneal ruptures may go undiagnosed
for variable lengths of time. Metabolic and electrolyte abnormalities (eg,
hyperkalemia, hypernatremia, uremia, acidosis) may occur as urine is
reabsorbed through the peritoneal cavity. Additionally, such patients may
appear anuric.
Picture. Cystogram of extraperitoneal bladder rupture. Note the fractured pelvis and
contrast extravasation into the space of Retzius.
c. Priapism
Priapism is an involuntary, prolonged erection unrelated to sexual
stimulation and unrelieved by ejaculation. This condition is a true urologic
emergency, and early intervention allows the best chance for functional
recovery (Al-Qudah, 2016).
1. Low-flow priapism
This condition is generally painful, although the pain may disappear
with prolonged priapism. Characteristics of low-flow priapism include
the following:
1) Rigid erection
2) Ischemic corpora: As indicated by dark blood upon corporeal
aspiration
3) No evidence of trauma
2. High-flow priapism
This type of priapism is generally not painful and may manifest in an
episodic manner. Characteristics of high-flow priapism include the
following:
1) Adequate arterial flow
2) Well-oxygenated corpora
3) Evidence of trauma: Blunt or penetrating injury to the penis or
perineum (straddle injury is usually the initiating event)
d. Testicular Torsion
Testicular torsion refers to the torsion of the spermatic cord structures
and subsequent loss of the blood supply to the ipsilateral testicle. This is a
urological emergency; early diagnosis and treatment are vital to saving the
testicle and preserving future fertility. The rate of testicular viability decreases
significantly after 6 hours from onset of symptoms (Ogunyemi, 2016).
Testicular torsion is primarily a disease of adolescents and neonates. It
is the most common cause of testicular loss in these age groups. However,
torsion may occasionally occur in men 40-50 years old (Ogunyemi, 2016).
Surgical treatment may prevent further ischemic damage to the testis.
Rarely, observation is appropriate, depending on the pathology. Diagnosis of
testicular torsion is clinical, and diagnostic testing should not delay treatment
(Ogunyemi, 2016).
Testicular torsion is caused by twisting of the spermatic cord and the
blood supply to the testicle (see the image below). With mature attachments,
the tunica vaginalis is attached securely to the posterior lateral aspect of the
testicle, and, within it, the spermatic cord is not very mobile. If the attachment
of the tunica vaginalis to the testicle is inappropriately high, the spermatic
cord can rotate within it, which can lead to intravaginal torsion. This defect is
referred to as the bell clapper deformity. This occurs in about 17% of males
and is bilateral in 40% (Ogunyemi, 2016).
Intravaginal torsion most commonly occurs in adolescents. It is
thought that the increased weight of the testicle after puberty, as well as
sudden contraction of the cremasteric muscles (which inserts in a spiral
fashion into the spermatic cord), is the impetus for acute torsion (Ogunyemi,
2016).
By contrast, neonates more often have extravaginal torsion. This
occurs because the tunica vaginalis is not yet secured to the gubernaculum
and, therefore, the spermatic cord, as well as the tunica vaginalis, undergo
torsion as a unit. Extravaginal torsion is not associated with bell clapper
deformity. This can occur up to months prior to birth and, therefore, is
managed differently depending on presentation. Of course, neonates can have
intravaginal torsion and this should be managed in the same manner as
adolescents (Ogunyemi, 2016).
Testicular torsion is associated with testicular malignancy, especially
in adults; one study found a 64% association of testicular torsion with
testicular malignancy. This is thought to be secondary to a relative increase in
the broadness of the affected testicle compared with its blood supply.
However, in a review of 32 patients who had been diagnosed with testicular
torsion, testicular cancer was found in 2 of the 20 patients who had undergone
orchiectomy, a rate of 6.4% (Ogunyemi, 2016).
Picture Testicular torsion: (A) extravaginal; (B) intravaginal (Ogunyemi, 2016).
e. Penile fracture
Penile fracture is the traumatic rupture of the corpus cavernosum.
Traumatic rupture of the penis is relatively uncommon and is considered a
urologic emergency. Sudden blunt trauma or abrupt lateral bending of the
penis in an erect state can break the markedly thinned and stiff tunica
albuginea, resulting in a fractured penis. One or both corpora may be involved,
and concomitant injury to the penile urethra may occur. Urethral trauma is
more common when both corpora cavernosa are injured. Penile rupture can
usually be diagnosed based solely on history and physical examination
findings; however, in equivocal cases, diagnostic cavernosography or MRI
should be performed. Concomitant urethral injury must be considered;
therefore, preoperative retrograde urethrographic studies should generally be
performed. Contraindications to surgical therapy include intolerance to general
anesthesia and a history of penile trauma but completely normal physical
examination findings. In patients with polytrauma, life-threatening injuries
must be prioritized; delayed penile repair can be considered when the patient
becomes medically stable. Patients with penile trauma require fluid
resuscitation prior to operative intervention (Santucci, 2015).
Picture 1. Severe penile fracture (Santucci, 2015).
f. Urethral injuries
Result in long-term morbidity and most commonly result from trauma.
The male urethra is much more commonly injured than the female urethra and
is the focus of this article.
Clinical presentation
Pathology
g. Ureteric injuries
Ureteric injury is a relatively uncommon, but severe event, which may
result in serious complications as a diagnosis is often delayed.
Clinical presentation
Pathology
Etiology
1) Iatrogenic
rate of injury is ~2% (range 0.5-3%) for laparoscopic
procedures
most commonly injured after gynaecological procedures
traumatic
uncommon; represents <1% of all urological trauma
direct trauma from penetrating injury is a more common cause
than blunt injury (Butler, 2012).
8. Congenital anomaly
a. Hydrocele
Hydrocele is defined as a collection of fluid between the parietal and visceral
layers of tunica vaginalis. Pathogenesis of primary hydrocele is based on patency
of processus vaginalis in contrast with secondary hydrocele. Incomplete
obliteration of the processus vaginalis peritonei results in formation of various
types of communicating hydrocele; a large open processus vaginalis allowing
passage of abdominal viscera results in clinical hernia. The exact time of
spontaneous closure of the processus vaginalis is not known. It persists in
approximately 80-94% of newborns and in 20% of adults. If complete obliteration
of the processus vaginalis occurs with patency of midportion, a hydrocele of the
cord occurs. Scrotal hydroceles without associated patency of the processus
vaginalis are encountered in newborns also. Non-communicating hydroceles,
based on an imbalance between the secretion and reabsorption of this fluid, are
found secondary to minor trauma, testicular torsion, epididymitis, varicocele
operation or may appear as a recurrence after primary repair of a communicating
or non-communicating hydrocele.
b. Hypospadias
Risk factors associated with hypospadias are likely to be genetic, placental
and/or environmental. Interactions between genetic and environmental factors
may help explain non-replication in genetic studies of hypospadias. Single
nucleotide polymorphisms seemed to influence hypospadias risk only in exposed
cases.
- An additional member with hypospadias is found in 7% of families.
- Endocrine disorders can be detected in rare cases.
- Babies of young or old mothers and babies with a low birth weight have a
higher risk of hypospadias.
- A significant increase in the incidence of hypospadias over the last 20 years
suggests a role for environmental factors (hormonal disruptors and pesticides)
[136-139]. Though this information has been questioned recently.
- The use of oral contraceptives prior to pregnancy has not been associated with
an increased risk of hypospadias in the offspring.
A Dutch case-control study confirmed that genetic predisposition
possibly plays a role in anterior and middle hypospadias, in contrast, the
posterior phenotype was more often associated with pregnancy-related factors,
such as primiparity, preterm delivery, and being small for gestational age.
Hormone-containing contraceptive use after conception increased the risk of
middle and posterior hypospadias, while multiple pregnancies were associated
with the posterior form in particular.
Classification systems
Hypospadias are usually classified based on the anatomical location of
the proximally displaced urethral orifice:
- Distal-anterior hypospadias (located on the glans or distal shaft of the penis
and the most common type of hypospadias)
- Intermediate-middle (penile)
- Proximal-posterior (penoscrotal, scrotal, perineal).
- The pathology may be much more severe after skin release (Europeon Society
of Pediatric Urology, 2015)
c. Renal Agenesis
Renal agenesis is a condition in which a newborn is missing one or both
kidneys. Unilateral renal agenesis (URA) is the absence of one kidney. Bilateral
renal agenesis (BRA) is the absence of both kidneys. The cause of renal agenesis
is not known, though some cases result from inherited mutated genes. Babies with
one kidney can live normally with ongoing tests and treatment. Those with no
kidneys need long-term dialysis to survive. Renal agenesis is typically found
during routine prenatal ultrasounds. If your doctor identifies BRA in your child,
they can use a prenatal MRI to confirm the absence of both kidneys
(Vanderheyden, 2011).
d. Pelvic Kidney
A fetal pelvic kidney is a condition that results when the kidneys fail to ascend
to their normal position above the waist and remain in the pelvis because they are
blocked by blood vessels in the aorta. A fetal pelvic kidney or horseshoe kidney
is generally diagnosed by ultrasound (sonogram) examination before birth.
Evaluation of the kidneys is part of the routine ultrasound examination done by
many obstetricians as part of their prenatal care around the 20th week of
pregnancy.
e. Horseshoe Kidney
Horseshoe kidney, as the kidneys of the fetus rise from the pelvic area, they
become attached (fuse) together at the lower end or base. By fusing, they form
into a U shape, like a horseshoe. This is thought to happen more often in males than
in females.
f. Ureteral Duplication
Partial or complete duplication of one or both ureters may occur with
duplication of the ipsilateral renal pelvis. In complete duplication, the ureter from
the upper pole of the kidney opens at a more caudal location than the orifice of
the lower pole ureter. As a result, the lower pole tends to reflux and the upper
pole tends to obstruct when pathology is present. Ectopia or stenosis of one or
both orifices, vesicoureteral reflux into the lower ureter or both ureters,
and ureterocele may occur. Surgery may be necessary if there is obstruction,
vesicoureteral reflux, or urinary incontinence. Incomplete duplication is rarely of
clinical significance.
g. Ureterocele
A ureterocele is a cystic out-pouching of the distal ureter into the urinary
bladder. It is one of the more challenging urologic anomalies facing pediatric and
adult urologists. Ureteroceles may pose a diagnostic and therapeutic dilemma
with perplexing clinical symptoms resulting from a spectrum of abnormal
embryogenesis associate with anomalous development from the intravesical
ureter, the kidney, and the collecting system.