Mondor Disease of the Breast
A painful cord-like swelling of the breast is most likely Mondor disease—superficial thrombophlebitis of the thoracoepigastric vein—which presents as a palpable, tender, subcutaneous cord typically running along the breast or from the breast to the axilla or abdomen 1.
Diagnosis
The diagnosis is primarily clinical but should be confirmed with imaging:
Ultrasound is the diagnostic modality of choice 2, 3
- Gray-scale shows a noncompressible, hypoechoic, undulating tubular structure in the subcutaneous fat
- Color Doppler reveals no flow signal in the thrombosed vein (though arterial flow may be visible adjacent to it) 3
- Confirms thrombosis of the superficial vein (usually thoracoepigastric vein)
Clinical features to identify:
Essential Workup
Perform a thrombophilic workup to exclude hypercoagulability conditions 2. This is critical because while Mondor disease is typically benign, underlying coagulation disorders must be ruled out.
Age-appropriate breast imaging is mandatory to exclude underlying malignancy 1:
- Diagnostic mammogram ± ultrasound for women ≥30 years
- Ultrasound alone may suffice for women <30 years
This is crucial because while Mondor disease itself is benign, breast cancer can occasionally present with similar findings, and noncyclical focal breast pain warrants evaluation to exclude malignancy 1.
Treatment
The current standard is low-molecular-weight heparin (LMWH) at prophylactic or intermediate doses for at least 4 weeks 2:
- Enoxaparin 1 mg/kg daily for 30 days is the specific regimen supported by recent evidence 2
- This represents a shift from older symptomatic-only approaches
Symptomatic management with NSAIDs can be added for pain control 2, 4.
Prognosis and Follow-up
- Excellent prognosis: Approximately 75% of patients experience spontaneous resolution within 4 weeks, even without specific treatment 4
- 6-week follow-up ultrasound is recommended to document resolution of the venous thrombosis 3
- Recurrence is rare 4
- 1-year mortality and malignancy occurrence are not increased 4
Important Caveats
Do not confuse with post-surgical "cording" (axillary web syndrome), which occurs after breast cancer surgery, particularly axillary lymph node dissection 5. Post-surgical cording:
- Affects 31-36% of patients after breast cancer surgery
- Is associated with functional impairment and lymphedema risk
- Requires different management (physical therapy, stretching)
Predisposing factors for Mondor disease include trauma, excessive physical activity, surgery, infections, and rarely prolonged immobilization 2, 4. However, more than half of patients have no identifiable predisposing factors 4.
Key distinction from inflammatory breast cancer: Mondor disease lacks the erythema, peau d'orange, and breast edema that characterize inflammatory breast cancer 6. If these features are present, urgent biopsy is required as inflammatory breast cancer is a clinical diagnosis requiring immediate treatment.