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Metastatic carcinoid presenting as a breast lesion
Current Oncology (Toronto, Ont.)
|December 15, 2010
Summary
Metastatic breast carcinoid tumors are rare, often presenting with ambiguous symptoms. This case highlights the diagnostic challenges and features of this unusual entity originating from the ileum.
Area of Science:
- Oncology
- Radiology
- Pathology
Background:
- Metastasis to the breast is rare, accounting for <2% of breast tumors.
- Contralateral breast primaries are the most common source of breast metastases.
- Other rare primary sites include melanoma, lung, gastric, renal cancers, and carcinoid tumors.
Purpose of the Study:
- To report an exceedingly rare case of metastatic breast carcinoid originating from the terminal ileum.
- To describe the diagnostic challenges, mammographic, cytologic, and immunohistochemical features of metastatic breast carcinoid.
- To review clinical features, prognosis, and treatment options for this rare entity.
Main Methods:
- Case report of a 52-year-old woman with a mammographic abnormality.
- Excisional biopsy revealing carcinoid histopathology.
- Exhaustive work-up to identify the primary tumor site (terminal ileum carcinoid).
Main Results:
- Diagnosis of metastatic breast carcinoid, an exceedingly rare entity.
- The patient presented with a mammographic abnormality.
- Histopathology and immunohistochemistry confirmed carcinoid tumor.
Conclusions:
- Metastatic breast carcinoid tumors present diagnostic challenges due to ambiguous symptoms and lack of carcinoid syndrome.
- Accurate diagnosis relies on integrated mammographic, cytologic, and immunohistochemical findings.
- Understanding the features, prognosis, and treatment of this rare condition is crucial for patient management.
