What is the appropriate evaluation and management for a 26-year-old man with a one-week history of right groin pain radiating to the abdomen, mild nausea when sitting, and no dysuria?

Evaluation and Management of Right Groin Pain in a 26-Year-Old Man

This 26-year-old man requires a focused physical examination to differentiate between musculoskeletal causes (adductor, inguinal, iliopsoas, or pubic-related pain) and non-musculoskeletal etiologies (hernia, genitourinary, or neuropathic causes), followed by targeted imaging based on examination findings.

Initial Clinical Assessment

The presentation of right groin pain radiating to the abdomen with positional nausea (worse when sitting) and absence of dysuria suggests either musculoskeletal pathology or an inguinal hernia as the most likely diagnoses. The one-week duration and young age make acute surgical emergencies less likely but still require consideration.

Key Physical Examination Maneuvers

Perform these specific tests systematically 1:

• Direct palpation over the adductor tendons, pubic symphysis, inguinal canal, and iliopsoas region
• Palpation for inguinal bulge or impulse while patient coughs or strains (standing position)
• Adductor squeeze test to assess for adductor-related pain
• Hip range of motion testing to evaluate for iliopsoas or hip joint pathology
• Testicular examination to exclude testicular torsion, epididymitis, varicocele, or hydrocele 2

The positional nature of symptoms (worse when sitting) and radiation pattern suggest either inguinal hernia or iliopsoas-related pathology as leading considerations.

Diagnostic Imaging Strategy

If Inguinal Hernia is Suspected

Dynamic ultrasonography is the initial imaging modality of choice to evaluate for true hernia and assess posterior abdominal wall weakness 1. Ultrasound is particularly useful when physical examination shows no palpable bulge but clinical suspicion remains high 3. The real-time capability allows assessment during Valsalva maneuver, increasing diagnostic sensitivity 4.

If Musculoskeletal Pathology is Suspected

MRI of the pelvis should be performed if the diagnosis remains unclear after physical examination or if symptoms persist despite initial conservative management 1. MRI is especially valuable when pain is poorly localized and can evaluate the rectus abdominis/adductor longus aponeurosis, pubic bone pathology, and concomitant hip pathology 4.

If Acute Urological Emergency is Considered

While the absence of dysuria makes urological causes less likely, testicular torsion and epididymitis remain time-sensitive diagnoses requiring urgent ultrasound evaluation if testicular examination is abnormal 2.

Management Algorithm

For Inguinal-Related Pain (With or Without Hernia)

• Without hernia on imaging: Initiate active, supervised physical therapy focusing on core strengthening and neuromuscular rehabilitation 1
• With confirmed hernia: Surgical referral is appropriate, though not all hernias require immediate repair if minimally symptomatic 3

For Adductor or Pubic-Related Pain

Active, supervised physical therapy is the initial treatment 1. This should be the first-line approach before considering other interventions.

For Iliopsoas-Related Pain

Obtain hip radiography and MRI given the high likelihood of concomitant hip pathology 1. Treatment depends on specific findings but typically involves physical therapy targeting hip flexor pathology.

For Neuropathic Pain

If examination suggests nerve involvement (iliohypogastric, ilioinguinal, genitofemoral, or lateral femoral cutaneous nerve), consider image-guided diagnostic nerve blocks to confirm the diagnosis and guide treatment 5.

Common Pitfalls to Avoid

• Don't assume all groin pain is hernia-related: The differential is broad, including musculoskeletal (most common in young men), urological, and neuropathic causes 6
• Don't skip the testicular examination: Testicular torsion and epididymitis are emergencies that can present with groin pain radiating to the abdomen 2
• Don't order CT for initial groin pain evaluation: While CT is excellent for right lower quadrant pain when appendicitis is suspected 7, it is not the first-line imaging for isolated groin pain. Ultrasound and MRI are more appropriate and avoid unnecessary radiation 1, 4
• Don't delay imaging if "red flags" are present: Severe pain, inability to bear weight, fever, or acute testicular symptoms warrant urgent evaluation

Specific Recommendation for This Patient

Given the radiation to the abdomen and positional symptoms, start with dynamic ultrasound to evaluate for inguinal hernia. If negative and symptoms persist, proceed to MRI of the pelvis to assess for musculoskeletal pathology, particularly iliopsoas or adductor-related causes. Initiate physical therapy focusing on core strengthening while awaiting imaging results, as this is effective for most musculoskeletal causes and has no downside risk.