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Heterotopic Epithelium in an Intramammary Lymph Node
Lester J. Layfield1, Eoghan Mooney
1Department of Pathology, University of Utah, Salt Lake City, Utah, and Department of Pathology, Duke University Medical Center, Durham, North Carolina.
The Breast Journal
|May 12, 2001
Summary
This case report describes benign squamous-lined cysts within an intramammary lymph node. These rare epithelial inclusions can mimic metastatic carcinoma but are histologically benign.
Area of Science:
- Pathology
- Surgical Pathology
- Oncology
Background:
- Epithelial inclusions in lymph nodes are rare findings.
- These inclusions are typically benign and unrelated to malignancy.
- They can present as lymphadenopathy, potentially mimicking metastatic disease.
Purpose of the Study:
- To describe a case of heterotopic squamous-lined cysts in an intramammary lymph node.
- To highlight the importance of differentiating these benign lesions from metastatic carcinoma.
- To add these findings to the spectrum of benign heterotopic epithelial structures in lymph nodes.
Main Methods:
- Case presentation of a 23-year-old woman with an intramammary mass.
- Excisional biopsy and subsequent histopathological examination.
- Microscopic analysis of lymph node architecture and epithelial lining.
Main Results:
- A well-circumscribed mass was identified as an intramammary lymph node.
- The lymph node architecture was distorted by multiple squamous-lined cysts.
- The squamous epithelium showed a prominent granular cell layer without nuclear atypia.
Conclusions:
- Benign epithelial deposits, such as squamous-lined cysts, can occur heterotopically within intramammary lymph nodes.
- Accurate histopathological evaluation is crucial to distinguish these benign lesions from metastatic carcinoma.
- These findings expand the list of recognized benign epithelial structures within lymph nodes.