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Lobular neoplasia displaying central necrosis: a potential diagnostic pitfall
Marilin Rosa1, Amir Mohammadi, Shahla Masood
1Department of Pathology and Laboratory Medicine, University of Florida, College of Medicine, 655 West 8th Street, Jacksonville, FL 32209, USA. marilin.rosa@jax.ufl.edu <marilin.rosa@jax.ufl.edu>
Pathology, Research and Practice
|April 3, 2010
Summary
Distinguishing lobular neoplasia with comedo necrosis from ductal carcinoma is challenging. Accurate differentiation is crucial for patient prognosis and treatment decisions.
Area of Science:
- Pathology
- Oncology
- Breast Cancer Research
Background:
- Differentiating between ductal and lobular intraepithelial neoplasias is generally clear.
- However, certain cases, such as lobular neoplasia with comedo-type necrosis, pose diagnostic challenges even for experienced pathologists.
Observation:
- This study presents six cases of lobular neoplasia with comedo necrosis.
- Three cases were correctly identified, while three were initially misdiagnosed as ductal carcinoma in situ with necrosis.
- One misdiagnosed patient received radiation therapy; two were correctly reclassified after excisional biopsies. One case exhibited microinvasion.
Findings:
- All six lesions tested negative for E-cadherin immunohistochemistry.
- Lobular neoplasia with comedo necrosis can be mistaken for ductal carcinoma in situ with necrosis.
- E-cadherin negativity was observed in all studied lesions.
Implications:
- Accurate differentiation of ductal and lobular intraepithelial neoplasias is critical.
- Misdiagnosis can lead to inappropriate treatment, such as radiation therapy.
- Correct diagnosis impacts patient prognosis and therapeutic strategies.