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Carcinoma within fibroadenomas: mammographic features
K S Baker1, B S Monsees, N M Diaz
1Mallinckrodt Institute of Radiology, St Louis, MO 63110.
Radiology
|August 1, 1990
Summary
Carcinoma within fibroadenomas is rare but can present as suspicious mammographic masses. Careful histologic examination is crucial for accurate diagnosis, as imaging features may mimic benign fibroadenomas.
Area of Science:
- Radiology
- Oncology
- Pathology
Background:
- Fibroadenomas are common benign breast tumors.
- Malignancy within a fibroadenoma is a rare occurrence.
- Accurate differentiation from benign fibroadenomas is clinically important.
Purpose of the Study:
- To analyze the mammographic and histologic features of carcinoma arising within fibroadenomas.
- To identify imaging characteristics suggestive of malignancy in fibroadenomas.
Main Methods:
- Retrospective review of mammographic and pathologic data from 24 patients.
- Histologic examination to classify the type of carcinoma (LCIS, DCIS, invasive).
- Correlation of mammographic findings with histologic diagnoses.
Main Results:
- All 24 cases presented as mammographic masses ≥ 1.0 cm.
- Suspect features included large size, indistinct margins, and clustered microcalcifications.
- Histology revealed predominantly in situ carcinomas (LCIS, DCIS); only one invasive lobular carcinoma was found.
Conclusions:
- Carcinoma within fibroadenomas often presents as a large mass on mammography.
- Mammographic features can be indistinguishable from benign fibroadenomas.
- Histologic confirmation is essential for diagnosing malignancy within fibroadenomas.