Scrotal Patho Flashcards
Why can scrotal traumas be difficult to scan?
scrotum is often painful and swollen
What causes scrotal trauma?
- MVA
- athletic injury
- direct blow
- straddle injury
Goal for sonographer:
see if rupture of scrotum has occurred.
How much of the testes can be saved if surgery on ruptured testicle performed within 72 hours?
90%
What percent of ruptured testicles can be saved if surgery is performed after 72 hours?
45%
Son findings of scrotal rupture
- focal alteration of the testicular parenchymal pattern
- interruption of the tunica albuginea
- irregular scrotal contour
- scrotal wall thickening
- hematocele
What is a scrotal hematocele?
blood located between the visceral and parietal layers of the tunica vaginalis
What can scrotal hematocele result from?
bleeding of the pampiniform plexus or other extra testicular structure
Son appearance of acute scrotal hematocele:
echogenic with numerous, highly visible echoes that can be seen to float or move in real time
Son appearance of older scrotal hematocele:
low level echoes with fluid-fluid levels or septations
Son findings of scrotal hematoma:
- may be large, causing displacement of testis
- homogenous areas in scrotum
- become more complex with time, developing cystic components
- avascular
- may involve testis or epididymus or they can be contained in scrotal wall
What is epididymo-orchitis?
infection of the epididymus and testis
What does epididymo-orchitis result from?
- spread of lower UTI via spermatic cord**
- mumps
- syphillis
- viruses
- trauma
- chemical causes
What is the most common cause of acute scrotal pain in adults?
epididymo-orchitis
What’s the term for only infection of the epididymus?
epididymitis..spreads to testis in about 20-40% of cases
Orchitis is almost always secondary to _______
epidymitis
Clinical symptoms of epididymo-orchitis
- scrotal pain that increases over 1 or 2 days
- fever
- urethral discharge
Son findings of epididymo-orchitis
- enlarged hypoechoic epididymus
- focal hyperechoic areas may be seen if hemorrhage has occured
- increased blood flow
- enlarged testis
- may be focal or diffuse (affected areas appearing hypoechoic compared to the surrounding tissue
- scrotal wall thickening
- hydroceles
- pyelocele possible
U/S exam for epididymo-orchitis must include:
- image showing both testes so the size and echogenicity can be compared
- image with color box opened wide to show portions of both testes so that the flow between sides can be compared
Describe scrotal hydroceles:
- fluid formation between the visceral and parietal layers of tunica vaginalis
- found along anterolateral aspect of testis
- may be anechoic or contain low level echoes
- complex hydroceles can be associated with severe epididymitis and orchitis (may contain thick septations and echoes)
Describe pyelocele of the scrotum
- occurs when puss fills the space between layers of the tunica vaginalis
- contains internal septations, debris and loculations
Why does torsion occur?
- result of abnormal mobility of the testis within the scrotum
- the testis and epididymis twist within the scrotum, cutting off the vascular supply within the spermatic cord
- blood flow is compromised to the testis, epididymis and the intrascrotal portions of the spermatic cord
Describe flow issues with torsion
- venous flow affected first with occluded veins, causing swelling of the scrotal structures on the affected side
- if torsion continues, the arterial flow is obstructed and testicular ischemia follows
T/F: Torsion is not a surgical emergency?
False, it is
What is the salvage rate if torsion surgery is performed 5-6 hours after onset of pain?
-80-100%
What is the salvage rate for torsion if surgery is performed 6-12 hours after pain onset?
70%
After 12 hours of pain onset, what is the salvage rate for torsion?
20%
What is the most common cause for scrotal pain in adolescents?
torsion, peak age is 14
Clinical symptoms of torsion:
- sudden onset of scrotal pain
- swelling of affected side
- nausea
- vomiting
Son findings of torsion before 4 hours:
may appear normal
Son findings of torsion after 4-6 hours
- testis may become swollen and hypoechoic
- affected side will be avascular
- epididymal head may appear enlarged and may have a decreased echogenicity or heterogeneous texture
- scrotal skin thickening
- reactive hydrocele
Son doppler findings of torsion
- makes diagnostic images of torsion duh
- an absence of perfusion in the symptomatic side with normal perfusion demonstrated in the asymptomatic side is considered diagnostic of torsion
- doppler parameters must be adjusted for optimal detection of a slow flow rate
Describe scrotal cysts:
- benign fluid collections located within the extra testicular structures
- most are extratesticular and are found in the tunica albuginea or epididymus
What are spermatoceles?
- cystic dilatations of the efferent ductules of the epididymis
- always located in the epididymal head
What do spermatocele cysts contain?
proteinaceuos fluid and spermatozoa
What may be seen more often following a vasectomy?
spermatoceles
Son findings of spermatoceles
-may be simple cysts
-may be mulilocular cystic collections
-may contain internal echoes
-
What are epididymal cysts?
- small, clear cysts containing serous fluid
- found anywhere in the epididymis
- asymptomatic and benign but may be palpable
Son findings of epididymal cysts:
- simple fluid filled structures
- thin walls
- posterior enhancement
T/F: U/S cannot reliably differentiate between epididymal cysts and spermatoceles?
True
What is a varicocele?
-abnormal dilatation of the veins of the pampinoform plexus (in spermatic cord)
What are varicoceles caused by?
incompetent venous valves within the spermatic vein
Where are varicoceles more common?
- on the left due to the left spermatic vein emptying into the left renal vein at a steep angle which may inhibit blood flow
- -left renal vein may also become compressed between aorta and the SMA