Clinical Findings of Scrotal Varicocele
Varicocele is diagnosed primarily by physical examination revealing a palpable, abnormal dilatation and tortuosity of the spermatic cord veins, classically described as a "bag of worms" sensation, most commonly on the left side. 1, 2
Physical Examination Findings
Laterality and Grading
- Left-sided predominance: 80% of clinical varicoceles occur on the left side, 5% on the right, and 15% are bilateral 3
- Clinical grading system (based on palpability):
- Grade 1: Palpable only with Valsalva maneuver
- Grade 2: Palpable without Valsalva but not visible
- Grade 3: Visible through scrotal skin and easily palpable 3
Key Physical Findings
- Palpable dilated veins along the spermatic cord that increase with standing or Valsalva
- Testicular size asymmetry: Difference >2 mL or 20% indicates clinically significant varicocele, particularly in adolescents 1
- "Bag of worms" texture on palpation of the spermatic cord
- Findings typically diminish or disappear when patient is supine
Important Clinical Distinction: Clinical vs Subclinical
Physical examination alone misses a substantial proportion of varicoceles. Studies show that physical examination has 73.9% sensitivity and 85% positive predictive value, with 17-46% of varicoceles being subclinical (not palpable but detected on ultrasound) 3, 4. However, subclinical varicoceles should NOT be treated, as treatment does not improve pregnancy rates 1.
Associated Clinical Features
Fertility Impact
- Present in 15% of normal males, 25% of men with abnormal semen, and 35-40% of infertile men 1
- Azoospermia is significantly more common with varicocele (46.7% vs 20% in controls; OR 3.51) 5
- Oligozoospermia occurs in 60% with varicocele vs 35.6% without (OR 2.71) 5
- Higher varicocele grade correlates with worse semen parameters 1
Testicular Findings
- Testicular atrophy or size discrepancy (>2 mL difference) 1
- Smaller testicular volume on affected side
- Normal testicular consistency (unless atrophic)
Ultrasound Correlation
When ultrasound is performed (though not routinely indicated for palpable varicoceles):
- Pampiniform plexus diameter: Mean 2.95 ± 0.72 mm on left in varicocele patients vs 1.47 ± 0.19 mm in controls 5
- Doppler shows venous reflux with Valsalva
- Bilateral involvement is more common on ultrasound (47%) than appreciated clinically (15%) 3
Critical Clinical Pitfalls
⚠️ Do NOT routinely order scrotal ultrasound to investigate for varicocele if none is palpable—treatment of subclinical varicoceles is ineffective 6
⚠️ Right-sided or isolated right varicoceles warrant additional evaluation to rule out retroperitoneal pathology causing venous obstruction
⚠️ Varicocele that does not decompress when supine suggests possible venous obstruction requiring further imaging
When Physical Examination Matters for Treatment
Only treat palpable (clinical) varicoceles in the following contexts 1:
- Infertile men with abnormal semen parameters AND female partner with good ovarian reserve
- Adolescents with persistent testicular size difference >2 mL or 20% confirmed on two visits 6 months apart
- Men with elevated sperm DNA fragmentation and unexplained infertility (weaker indication)
Do NOT treat if semen analysis is normal or varicocele is only detected by ultrasound (subclinical) 1.