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Zorluk: OrtaBreast Disorders

A 5252-year-old woman comes to the surgical clinic for evaluation of a newly discovered lump in her left breast. She first noticed the mass 22 weeks ago. 66 months prior, she underwent a bilateral reduction mammoplasty. She has no personal or family history of breast disease. On physical examination, there is a 33-cm, firm, irregular mass in the lower outer quadrant of the left breast. The skin overlying the mass shows mild dimpling. There is no axillary lymphadenopathy. Diagnostic mammography reveals a localized area of increased density with coarse, irregular calcifications and spiculated margins. A core needle biopsy of the mass is performed. Which of the following is the most likely histopathologic finding in this patient's breast lesion?

  1. A
    Solid sheets of pleomorphic epithelial cells infiltrating a dense desmoplastic stroma
  2. B
    Proliferation of intralobular stroma compressing ductal spaces into slit-like channels
  3. Lipid-laden macrophages and multinucleated giant cells surrounding necrotic adipocytesCevap
  4. D
    Diffuse infiltration of neutrophils with localized tissue liquefaction
  5. E
    Single-file lines of small, uniform cells invading the stroma without duct formation

Cevap

Lipid-laden macrophages and multinucleated giant cells surrounding necrotic adipocytes
The correct answer identifies the histologic features of fat necrosis. This patient's presentation of a firm, irregular breast mass with skin dimpling and a spiculated mammographic appearance is classically suspicious for breast cancer. However, her recent history of a reduction mammoplasty points strongly to fat necrosis as the underlying cause. Breast trauma (including surgery, seatbelt injury, or blunt trauma) damages adipocytes, releasing lipids that incite a localized inflammatory response. Over time, this leads to fibrosis, which can pull on Cooper's ligaments (causing skin dimpling) and create a spiculated mass with coarse calcifications on mammography. A core needle biopsy is necessary to definitively rule out malignancy; in fat necrosis, it typically reveals lipid-laden macrophages (foam cells), multinucleated giant cells, and anucleate (necrotic) adipocytes surrounded by fibrous tissue.

Adım Adım Çözüm

1
Analyze the patient's history and risk factors.
The patient is a 52-year-old woman with a recent history of significant breast surgery (reduction mammoplasty 6 months ago).
Recent breast surgery or trauma is a major risk factor for developing localized tissue injury and subsequent fat necrosis.
2
Evaluate the clinical and radiographic findings.
Clinical exam shows a firm, irregular mass with skin dimpling. Mammography shows a spiculated mass with coarse calcifications.
These findings are highly suspicious for malignancy, but are also the classic presentation of fat necrosis, which is known to mimic breast cancer.
3
Determine the expected histopathology based on the diagnosis of fat necrosis.
The biopsy will show lipid-laden macrophages (foam cells), multinucleated giant cells, and anucleate adipocytes.
Fat necrosis is an inflammatory response to damaged adipose tissue, leading to macrophage infiltration to clear the lipid debris, followed by fibrosis and calcification.

Anahtar Kavram

Fat necrosis of the breast is a benign condition resulting from local trauma or surgery that can clinically and radiographically mimic breast cancer. Diagnosis is confirmed by biopsy showing lipid-laden macrophages and giant cells.
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Breast Disorders

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