Can the imaging findings be interpreted for a female patient with a history of bilateral breast implant removal and subsequent reconstructive surgery with mesh placement, now presenting with left breast and chest‑wall pain radiating to the shoulder and worsened by repetitive left‑arm movements?

Imaging Interpretation for Post-Reconstructive Breast Surgery with Mesh and Focal Pain

For this patient with focal, noncyclical left breast and chest wall pain following reconstructive surgery with mesh placement, ultrasound is the most appropriate initial imaging modality, with diagnostic mammography (or digital breast tomosynthesis) added if the patient is ≥40 years old or has risk factors warranting mammographic evaluation. 1

Clinical Context and Imaging Rationale

This patient presents with noncyclical, unilateral, focal breast pain that is precisely localizable, tender to touch, and exacerbated by repetitive arm movements. According to ACR guidelines, this presentation warrants imaging evaluation to exclude underlying pathology, identify treatable causes, and provide reassurance 1.

Key Clinical Features Supporting Imaging:

• Focal, reproducible pain (not diffuse or cyclical)
• Unilateral presentation with radiation to shoulder and axilla
• History of complex reconstruction with mesh placement and prior radiation
• Occupational exacerbation suggesting mechanical or inflammatory etiology
• No palpable mass (but this does not exclude pathology)

Recommended Imaging Approach

Primary Imaging Strategy:

1. Targeted Ultrasound (US) of the Left Breast and Chest Wall

• Most appropriate initial study for evaluating focal breast pain in the reconstructed breast 2
• Can assess for:
  • Fluid collections (seroma, hematoma, abscess)
  • Mesh-related complications
  • Soft tissue masses or inflammatory changes
  • Chest wall abnormalities
  • Fat necrosis (common post-reconstruction complication) 2, 3

2. Diagnostic Mammography or Digital Breast Tomosynthesis (DBT)

• Add if patient is ≥40 years old or has risk factors 1
• DBT superior to standard mammography for characterizing noncalcified lesions and reducing tissue overlap artifacts 1
• Can identify:
  • Architectural distortions
  • Calcifications (including capsular calcifications)
  • Asymmetries related to surgical changes 4, 5

Important Considerations:

The negative predictive value of combined mammography and ultrasound for cancer at the site of focal breast pain is 100% 1, providing strong reassurance when both are negative.

Expected Post-Surgical Findings vs. Concerning Features

Normal Post-Reconstruction Findings:

• Surgical scar/bed changes (most common) 4
• Architectural distortion at surgical sites
• Fat necrosis (calcified or non-calcified) 2, 4, 3
• Capsular calcifications around mesh/implant sites 4
• Focal asymmetries related to reconstruction 4

Findings Requiring Further Evaluation:

• New or enlarging fluid collections (seroma, hematoma, abscess)
• Suspicious masses distinct from expected post-surgical changes
• Progressive architectural distortion
• Inflammatory changes suggesting infection or mesh complication
• Features suspicious for recurrence (though rare at chest wall) 2

Specific to This Patient's Mesh Reconstruction:

The mesh placement creates unique imaging considerations:

• Mesh can cause chronic inflammation leading to pain, particularly with repetitive motion 1
• Capsular contracture or fibrosis around mesh may be visible on imaging 6
• Nerve entrapment or irritation from mesh or scar tissue can cause radiating pain to shoulder/axilla 1
• Radiation history increases risk of delayed complications including fat necrosis and fibrosis 1

When Advanced Imaging May Be Needed:

MRI is NOT routinely indicated for breast pain evaluation 1. However, MRI may be considered if:

• Initial imaging (US ± mammography) is equivocal
• There is concern for deep chest wall involvement or recurrence
• Evaluation of mesh integrity or deep tissue complications is needed 3, 7

MRI is superior to CT for detecting residual or recurrent tumor after chest wall radiation or resection, particularly with T1-weighted fat-suppressed sequences with gadolinium 8, 3.

Critical Pitfalls to Avoid:

1. Do not dismiss focal pain as "normal post-surgical" without imaging evaluation—noncyclical focal pain requires assessment to exclude underlying pathology 1

2. Do not rely solely on negative imaging to override highly suspicious clinical findings—if physical examination is strongly concerning, biopsy may still be warranted despite negative imaging 9

3. Recognize that cancer as a cause of focal breast pain is rare (2.3% at pain site in one study) but not zero 1—the primary goal is reassurance and identifying treatable benign causes

4. Consider extramammary causes: Given radiation to shoulder/axilla, consider musculoskeletal etiologies (costochondritis, pectoral muscle strain, nerve entrapment) or referred pain 1

Work Restrictions and Clinical Management:

The patient's request for work restrictions limiting repetitive left arm movements is clinically appropriate given:

• Pain exacerbation with repetitive motion suggests mechanical or inflammatory etiology
• Mesh-related complications can worsen with repetitive stress
• Temporary activity modification is reasonable pending imaging results and definitive diagnosis

The imaging results will guide whether the pain is related to mesh complications, post-surgical changes, infection, or other treatable causes, thereby informing both treatment decisions and the appropriateness of future reconstructive intervention.