Mastitis and breast abscess vs Inflammatory breast cancer
How to tell Mastitis and breast abscess and Inflammatory breast cancer apart when a board question makes them look alike.
Mastitis/abscess is infectious and often lactational; inflammatory breast cancer is malignant dermal lymphatic obstruction that mimics infection but persists.
Side by side
Mastitis causes painful erythematous breast inflammation, fever, and lactation association; abscess adds a fluctuant collection or persistent focal mass.
Inflammatory breast cancer causes rapidly progressive erythema, edema, peau d orange, warmth, and breast enlargement from dermal lymphatic invasion, often without lactation.
Mastitis is usually bacterial infection through nipple trauma during breastfeeding, commonly involving skin flora.
Inflammatory carcinoma obstructs dermal lymphatics with malignant cells, producing diffuse inflammatory-appearing skin changes.
Fever, leukocytosis, lactation, focal tenderness, response to antibiotics, or ultrasound fluid collection supports mastitis or abscess.
Persistent nonlactational skin thickening, peau d orange, lymphadenopathy, and biopsy showing carcinoma in dermal lymphatics support inflammatory cancer.
The trap
Red swollen breast is not always infection; lack of response or nonlactational peau d orange demands cancer evaluation.
The repair move
For an inflamed breast, check lactation, fever, focal abscess, response to antibiotics, and cancer warning signs.
Try a free question
CoreA 28-year-old woman 3 weeks postpartum, breastfeeding, presents with 2 days of focal erythema, warmth, and tenderness in the upper-outer quadrant of the right breast, temperature 38.7 C, and a wedge-shaped tender area without a fluctuant mass. Which diagnosis is most likely?
Show answer and explanation
Answer: A. Lactational mastitis. Lactational mastitis presents with focal erythema, warmth, and fever in a breastfeeding patient; treatment is continued breastfeeding plus dicloxacillin or cephalexin, with most cases resolving in 48-72 hours.
Why the other choices are tempting
- B. Inflammatory breast cancer has diffuse non-lactational rapidly progressive erythema with peau d'orange and lacks the focal wedge tenderness of mastitis.
- C. Breast abscess presents as a tender fluctuant collection often complicating untreated mastitis; this patient has no fluctuant mass.
- D. Mondor disease is superficial thrombophlebitis of breast veins, presenting as a tender palpable cord, not a wedge of inflammation.
- E. Fibrocystic change is cyclic non-inflammatory nodularity without fever.
Flashcards
Tap a card to flip it.
What setting supports mastitis?
Breastfeeding with nipple trauma supports mastitis.
What finding supports breast abscess?
A fluctuant collection or ultrasound fluid pocket supports breast abscess.
Quick answers
What is the fastest way to tell Mastitis and breast abscess from Inflammatory breast cancer?
Mastitis/abscess is infectious and often lactational; inflammatory breast cancer is malignant dermal lymphatic obstruction that mimics infection but persists.
What is the key clue for Mastitis and breast abscess?
Mastitis causes painful erythematous breast inflammation, fever, and lactation association; abscess adds a fluctuant collection or persistent focal mass.
What is the key clue for Inflammatory breast cancer?
Inflammatory breast cancer causes rapidly progressive erythema, edema, peau d orange, warmth, and breast enlargement from dermal lymphatic invasion, often without lactation.
What is the common trap with Mastitis and breast abscess vs Inflammatory breast cancer?
Red swollen breast is not always infection; lack of response or nonlactational peau d orange demands cancer evaluation.