Question

Difficulty: MediumBreast Disorders

A 24-year-old woman, gravida 1, para 1, comes to the emergency department 4 weeks postpartum due to a 3-day history of a painful, swollen right breast. She is exclusively breastfeeding her infant. She reports subjective fevers, chills, and fatigue. Her temperature is 38.8∘C38.8^\circ\text{C} (101.8∘F101.8^\circ\text{F}), blood pressure is 110/70 mmHg110/70\text{ mmHg}, and pulse is 102/min102/\text{min}. Physical examination of the right breast reveals a 4-cm area of marked erythema, induration, and tenderness in the lower outer quadrant. Careful palpation of this area reveals a distinct, centrally fluctuant mass. There is no overlying skin retraction or purulent nipple discharge. Which of the following is the most appropriate next step in management?

  1. Targeted ultrasound of the right breastAnswer
  2. B
    Initiation of oral dicloxacillin therapy
  3. C
    Diagnostic mammography
  4. D
    Immediate cessation of breastfeeding from the right breast
  5. E
    Core needle biopsy of the mass

Answer

Targeted ultrasound of the right breast
The patient's presentation of fever, localized breast erythema, and a fluctuant mass in the setting of lactation is highly suggestive of a breast abscess. The most appropriate next step in management is a targeted ultrasound of the breast. Ultrasound is the imaging modality of choice to confirm the presence of a fluid collection, differentiate it from severe mastitis without an abscess, and directly guide the first-line intervention, which is typically image-guided needle aspiration.

Step-by-Step Solution

1
Analyze the patient's clinical presentation.
The patient is a lactating postpartum woman with fever, localized breast erythema, tenderness, and a palpable fluctuant mass.
Identifying these classic signs differentiates complicated mastitis (abscess) from simple lactational mastitis.
2
Determine the primary diagnosis.
The presence of a fluctuant mass in the setting of mastitis strongly suggests a breast abscess.
Fluctuance indicates a localized collection of purulent fluid that requires mechanical intervention.
3
Select the most appropriate next step in management.
Targeted breast ultrasound is indicated.
Ultrasound confirms the presence of an abscess, evaluates its loculations, and provides guidance for first-line treatment, which is minimally invasive needle aspiration.

Key Concept

Diagnosis and management of lactational breast abscess
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