Epididymitis or epididymo orchitis ICD 10 N45.1 N45.3
Gradual onset
Fever dysuria pyuria
Torsion of appendix testis ICD 10 N44.2
Blue dot sign
Focal superior pole tenderness
Trauma with hematoma ICD 10 S30.2
Direct injury history
Ecchymosis
Hydrocele ICD 10 N43
Painless swelling
Transillumination
Varicocele ICD 10 I86.1
Dull ache
Bag of worms
Testicular tumor ICD 10 C62
Painless mass
Subacute discomfort possible
Renal colic referred pain ICD 10 N20
Flank pain hematuria
Normal scrotal exam possible
Laboratory Tests
Urinalysis and infection markers
Urinalysis
Pyuria supports epididymitis
Torsion still possible with incidental pyuria
Hematuria supports stone or trauma
Nonspecific finding
Urine culture
If epididymitis suspected
If febrile or toxic appearance
NAAT for gonorrhea and chlamydia
If STI risk
If epididymo orchitis in sexually active adolescent
Blood tests in selected patients
CBC
Leukocytosis supports infection
Normal CBC does not exclude infection
CRP or ESR
Supportive for inflammatory infection process
Limited role for ruling out torsion
Blood culture
If sepsis concern
Preoperative and sedation related
Type and screen
If operative management likely
If neonatal torsion or comorbidity with bleeding risk
Point of care glucose
If altered mental status
If procedural sedation planned
Diagnostic Tests
Scoring Systems
TWIST score
Testicular swelling 2 points
Visual or palpation asymmetry
Hard testis 2 points
Firmness compared with contralateral side
Absent cremasteric reflex 1 point
Higher utility in pediatric patients
Nausea or vomiting 1 point
Supports torsion probability
High riding testis 1 point
Elevated position relative to contralateral testis
TWIST interpretation use local thresholds
Low risk group
Ultrasound appropriate if available
Intermediate risk group
Urgent Doppler ultrasound plus urology involvement
High risk group
Immediate urology and consider OR without imaging
MRI
MRI scrotum
Rare ED use
Consider only if ultrasound nondiagnostic and stable patient
Limited availability and time delay
Not appropriate if high torsion suspicion
CT
CT abdomen pelvis
Not diagnostic for torsion
Consider only for alternate diagnosis
Stone suspected with flank pain hematuria
Incarcerated hernia suspected
Avoid delay of torsion management
Ultrasound
Color Doppler ultrasound
First line imaging when not delaying definitive care
Assess intratesticular blood flow
Compare to contralateral side
Torsion supportive findings
Absent or reduced intratesticular flow
Enlarged hypoechoic testis
Reactive hydrocele
Whirlpool sign of twisted spermatic cord
Limitations
Early torsion with preserved flow possible
Partial torsion with intermittent symptoms possible
Operator dependence
POCUS adjunct
Rapid comparative flow assessment
Does not replace formal study in equivocal cases
Disposition
Level of care decisions
Emergent operative management pathway
High clinical suspicion regardless of imaging
Doppler findings consistent with torsion
Failed manual detorsion with persistent pain
Admission and monitoring
Post orchiopexy observation per local protocol
Neonatal torsion admission for surgical management
Transfer criteria
No urologic surgical capability
Expected delay to OR beyond safe window
Arrange time critical transfer with receiving urology acceptance
Discharge criteria when torsion excluded
Discharge only after torsion reasonably ruled out
Low suspicion clinical picture
Doppler ultrasound reassuring
Follow up planning
Urology follow up for intermittent torsion concern despite normal imaging
Primary care follow up for benign causes
Treatment
Definitive management
Surgical management
Scrotal exploration urgent
Detorsion and orchiopexy if viable
Bilateral orchiopexy standard to prevent contralateral torsion
Consider fixation method per surgeon preference
Orchiectomy if nonviable testis
Counsel on fertility and endocrine implications
Consider prosthesis discussion later
Manual detorsion bedside pathway
Manual detorsion
Technique concept
Detorsion usually lateral rotation
Open book direction for typical torsion
Direction opposite if pain worsens
Multiple 180 degree rotations may be required
Reassess pain and lie after each step
Success indicators
Sudden pain relief
Lowering of testis position
Restoration of blood flow on ultrasound if available
Post detorsion actions
Immediate urology for orchiopexy
Doppler confirmation if time permits without delaying OR
Analgesia and antiemetics
Analgesia
Fentanyl IV
1 mcg per kg
Repeat 0.5 to 1 mcg per kg every 5 to 10 minutes to effect
Monitor respiratory rate and sedation
Morphine IV
0.05 to 0.1 mg per kg
Repeat every 10 to 15 minutes to effect
Monitor hypotension and respiratory depression
Ketorolac IV or IM
15 mg if under 65 years
30 mg option per local protocol
Avoid in renal failure bleeding risk
Acetaminophen PO
15 mg per kg
Maximum 1000 mg per dose
Maximum daily dose per local protocol
Antiemetic
Ondansetron IV or ODT
0.15 mg per kg
Maximum 8 mg per dose
QT prolongation risk in high risk patients
Procedural sedation if required
Sedation considerations
Indications
Severe pain preventing exam or detorsion attempt
Anxiety or guarding preventing safe manipulation
Monitoring
Continuous pulse oximetry
Capnography when available
Airway equipment ready
Ketamine IV
1 mg per kg
Additional 0.5 mg per kg as needed
Emergence reaction mitigation per local protocol
Propofol IV
0.5 to 1 mg per kg initial
Additional 0.25 to 0.5 mg per kg boluses
Hypotension and apnea risk higher
Antibiotics only when infection diagnosed
Epididymitis or epididymo orchitis treatment
STI associated regimen per local guideline
Ceftriaxone IM single dose plus doxycycline course
Alternative regimens per resistance patterns
Enteric organism risk regimen per local guideline
Fluoroquinolone options with age related safety considerations
Special Populations
Pregnancy
Pregnancy considerations
Acute scrotal pain in partner not applicable
Transgender patient with testes possible
Maintain torsion in differential
Respect anatomy based evaluation
Geriatric
Older adult considerations
Lower torsion prevalence
Tumor infection more common
Ultrasound interpretation pitfalls
Baseline reduced perfusion
Vascular disease confounders
Lower threshold for malignancy workup
Urology follow up for mass
Pediatrics
Pediatric considerations
Neonatal torsion
Extravaginal torsion typical
Often painless firm discolored hemiscrotum
Adolescent torsion
Intravaginal torsion typical
Bell clapper association
Weight based medication dosing
Use kg based dosing for opioids and sedation agents
Child protection context
Trauma history inconsistencies raise safeguarding concern
Background
Epidemiology
Epidemiology facts
Peak incidence adolescence
Pubertal growth related risk
Can occur at any age
Neonatal period and adulthood possible
Time to detorsion predicts outcome
Salvage highest within 6 hours
Declining salvage beyond 12 hours
Pathophysiology
Mechanism
Twisting of spermatic cord
Venous outflow obstruction first
Arterial inflow compromise later
Ischemia reperfusion injury after detorsion
Oxidative stress contribution
Testicular atrophy risk even after salvage
Predisposing anatomy
Bell clapper deformity
High attachment of tunica vaginalis allowing rotation
Therapeutic Considerations
Treatment principles
Definitive therapy surgical exploration and orchiopexy
Class I recommendation based on expert consensus for immediate surgical management when suspected
Imaging should not delay surgery when suspicion high
Negative ultrasound does not fully exclude torsion in intermittent or early cases
Manual detorsion is temporizing
Does not replace orchiopexy
Re torsion risk without fixation
Patient Discharge Instructions
copy discharge instructions
Discharge instructions
Reason for visit
Testicular torsion ruled out today based on exam and testing
Alternate diagnosis provided if applicable
Home care
Scrotal support and rest
Ice packs 10 to 15 minutes at a time as tolerated
Pain control with acetaminophen or NSAID if safe
Return immediately for any of the following
Sudden worsening scrotal pain
New nausea or vomiting with scrotal pain
Increasing swelling redness or fever
Abdominal or groin pain with scrotal symptoms
Follow up
Urology follow up if ongoing intermittent episodes
Primary care follow up within 24 to 72 hours for persistent symptoms
References
Clinical guidelines and evidence sources
Core references
Acute scrotum and testicular torsion urologic guideline sources
American Urological Association educational resources on acute scrotum and torsion
European Association of Urology guidance on acute scrotum and torsion
Emergency medicine review sources
Diagnostic performance summaries for Doppler ultrasound in torsion
TWIST score derivation and validation studies
Internal build instruction source
Output structure and checkbox formatting requirements
SymptomDx is an educational tool for medical professionals. It does not replace clinical judgment. Verify all clinical data and drug dosages with authoritative sources.