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Difficulty: HardBreast Disorders

Match each clinical presentation of a breast disorder to its most likely corresponding histopathological finding on core needle biopsy.

  • A 42-year-old woman presents with a 2-cm firm, irregular breast mass and skin retraction. She had a reduction mammoplasty 2 years ago. Mammography shows a spiculated mass with coarse calcifications.Lipid-laden macrophages, multinucleated giant cells, and localized fibrosis surrounding necrotic adipocytes.
  • A 54-year-old woman presents with a 6-cm firm, mobile, well-circumscribed breast mass that has doubled in size over the last 3 months.Hypercellular stroma forming leaf-like projections lined by benign epithelial cells.
  • A 38-year-old woman presents with spontaneous, unilateral, bloody nipple discharge. Examination reveals no palpable breast masses or axillary lymphadenopathy.Branching fibrovascular cores lined by both luminal epithelial and myoepithelial cells within a dilated duct.
  • A 62-year-old woman presents with an intensely pruritic, erythematous, scaly lesion over the left nipple that has failed to improve with a 4-week course of topical hydrocortisone.Large, atypical cells with abundant clear cytoplasm and prominent nucleoli residing individually or in small clusters within the epidermis.

Answer

Match the clinical presentations to their definitive histopathological features: Patient 1 (trauma/calcifications) has fat necrosis, Patient 2 (rapidly growing mass) has a phyllodes tumor, Patient 3 (bloody discharge) has an intraductal papilloma, and Patient 4 (steroid-refractory scaly nipple) has Paget disease of the breast.
Each clinical vignette uniquely maps to a single histopathological entity. Fat necrosis is linked to trauma and foamy macrophages. Phyllodes tumor presents as a rapidly enlarging mass with leaf-like stroma. Intraductal papilloma causes bloody discharge due to fibrovascular cores in a duct. Paget disease presents as an eczematous plaque containing intraepidermal malignant cells with clear halos.

Step-by-Step Solution

1
Analyze the presentation of Patient 1 (surgery history, skin retraction, coarse calcifications).
Diagnose fat necrosis.
Prior surgical trauma leads to fat necrosis, which can mimic malignancy clinically (skin retraction, spiculated mass) but shows lipid-laden macrophages and giant cells on biopsy.
2
Analyze the presentation of Patient 2 (54-year-old, rapidly enlarging 6-cm mobile mass).
Diagnose phyllodes tumor.
Rapid growth of a large, well-circumscribed mass in this age group points to a fibroepithelial lesion with cellular stroma and leaf-like architecture.
3
Analyze the presentation of Patient 3 (spontaneous, bloody nipple discharge without a mass).
Diagnose intraductal papilloma.
The most common cause of unilateral bloody discharge is a benign intraductal papilloma, defined by fibrovascular cores within a duct.
4
Analyze the presentation of Patient 4 (62-year-old, scaly nipple failing steroid therapy).
Diagnose Paget disease of the breast.
An eczematous-appearing nipple lesion that does not respond to topical therapy is Paget disease until proven otherwise, characterized by intraepidermal clear cells.

Key Concept

Clinicopathologic correlation of distinct breast disorders, distinguishing benign conditions, high-risk lesions, and malignancies based on age, presentation, and cellular architecture.
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Topics

Breast Disorders

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