Clinical Presentation of Epididymitis
Men with epididymitis typically present with unilateral testicular pain and tenderness, with palpable swelling of the epididymis and often a hydrocele. 1
Key Clinical Features
Primary Symptoms
- Unilateral testicular pain and tenderness (present in virtually all cases)
- Palpable epididymal swelling - usually starts at the lower pole and progresses toward the upper pole 2
- Gradual onset of pain - this is a critical distinguishing feature from testicular torsion, which presents with sudden, severe pain 1, 3
- Hydrocele - develops as a reactive process in approximately 31-67% of cases 4, 5
Associated Symptoms
- Urethritis symptoms - often asymptomatic but may include dysuria and urinary frequency 1, 6
- Fever - present in 30-87% of cases, more common in severe infections 7, 5
- Scrotal erythema and swelling - particularly prominent in neonatal cases 7
Age-Specific Presentations
Sexually Active Men <35 Years
- Usually accompanied by urethritis (often asymptomatic) 8, 1
- Most commonly caused by C. trachomatis or N. gonorrhoeae 1
- May have history of new sexual partner or unprotected intercourse
Men >35 Years
- More likely associated with urinary tract symptoms 1
- Often have predisposing factors: recent urinary instrumentation, surgery, or anatomical abnormalities 8, 1
- Caused primarily by Gram-negative enteric organisms 1
Pediatric Patients
- Prepubertal presentation is most common 9
- May have underlying genitourinary anomalies (18% of cases) 9
- Scrotal erythema and swelling are universal findings 7
- Normal urinalysis does not exclude the diagnosis 7
Critical Distinguishing Features
Differentiating from Testicular Torsion
This distinction is essential because testicular viability is compromised after 6 hours of torsion 8:
- Onset timing: Epididymitis has gradual onset over hours to days; torsion is sudden 1, 4
- Pain severity: Torsion typically causes more severe pain 1
- Prehn sign: Pain relief with testicular elevation suggests epididymitis (though not completely reliable) 4
- Cremasteric reflex: Intact in epididymitis, absent in torsion 3
- Age: Torsion is more common in adolescents and rare after age 35 8, 1
When diagnosis is questionable, immediate specialist consultation is mandatory because testicular viability may be compromised 1, 8, 1. Emergency testing for torsion is indicated when onset is sudden, pain is severe, or initial examination doesn't support urethritis or UTI diagnosis 1.
Physical Examination Findings
- Testis in normal anatomic position (unlike torsion where it may be elevated) 3
- Tender, swollen epididymis - palpable as distinct from testis 1
- Intact ipsilateral cremasteric reflex 3
- Scrotal skin changes - erythema and edema in severe cases 2, 7
Common Pitfalls
- Normal urinalysis does not exclude epididymitis, particularly in neonates and young children 7
- Asymptomatic urethritis is common in sexually transmitted cases - absence of urethral symptoms doesn't rule out STI etiology 8, 1
- Bilateral presentation is rare - if present, consider alternative diagnoses 10
- Severe pain alone warrants consideration of alternative diagnoses including torsion, testicular infarction, or abscess 1, 8, 1
When to Hospitalize
Hospitalization should be considered when 1, 8, 1:
- Severe pain suggests other diagnoses (torsion, infarction, abscess)
- Patient is febrile
- Concern about medication compliance
- Systemic complications present (sepsis, severe infection)