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Difficulty: MediumBreast and Endocrine Surgery

A 5353-year-old woman comes to the breast surgery clinic due to a 44-week history of right breast swelling, redness, and heaviness. She has no history of trauma, breast disease, or family history of cancer. She is postmenopausal. Her temperature is 37.0∘C37.0^\circ\text{C} (98.6∘F98.6^\circ\text{F}). Physical examination of the right breast reveals diffuse erythema, warmth, and marked skin edema with prominent pores, giving the skin a dimpled appearance. The breast is firm and enlarged, but no discrete, fluctuant mass is palpable. Firm, mobile right axillary lymph nodes are present. A 1010-day course of oral cephalexin prescribed by her primary care physician resulted in no clinical improvement. Diagnostic mammography and ultrasonography obtained prior to the visit show diffuse skin thickening and stromal edema, but no underlying localized mass or fluid collection. Which of the following is the most appropriate next step in management?

  1. Punch biopsy of the right breast skinAnswer
  2. B
    Intravenous vancomycin therapy
  3. C
    Magnetic resonance imaging of the breasts
  4. D
    Incision and drainage of the right breast
  5. E
    Topical corticosteroid therapy

Answer

Punch biopsy of the right breast skin
Inflammatory breast cancer (IBC) is an aggressive malignancy that typically presents with the rapid onset of breast erythema, edema, and a classic "peau d'orange" (orange peel) appearance caused by tumor emboli obstructing the dermal lymphatics. It often mimics acute mastitis, leading to an initial misdiagnosis. However, IBC should be highly suspected in a non-lactating woman who presents with these signs, lacks fever, and fails to improve with a trial of appropriate antibiotics. Because standard imaging (mammography and ultrasound) often only shows skin thickening and stromal edema without a distinct mass, the definitive and most appropriate next step in management is a skin punch biopsy. This procedure obtains a full-thickness sample of the dermis to histologically confirm the presence of malignant cells in the lymphatic channels.

Step-by-Step Solution

1
Analyze the patient's presentation and demographics.
A postmenopausal, non-lactating woman presents with rapid-onset diffuse breast erythema, peau d'orange, and axillary lymphadenopathy that did not respond to antibiotic therapy.
Identifying these key features helps differentiate between a simple infectious process (like mastitis) and a malignant process.
2
Evaluate the imaging results.
Mammogram and ultrasound show skin thickening without a localized fluid collection or discrete tumor mass.
This rules out an abscess that would require drainage and supports the suspicion of diffuse dermal lymphatic involvement.
3
Determine the definitive diagnostic requirement.
A full-thickness skin punch biopsy is required.
To confirm inflammatory breast cancer, histologic evidence of tumor emboli obstructing the dermal lymphatics must be obtained.

Key Concept

Diagnosis of inflammatory breast cancer
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Topics

Breast and Endocrine Surgery

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