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Immunophenotype of intraductal carcinoma
1Department of Pathology, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA.
Archives of Pathology & Laboratory Medicine
|January 1, 1996
Summary
Comedo and noncomedo intraductal carcinoma (IDC) have distinct immunophenotypes. These differences, particularly in receptor status and angiogenesis, may help predict prognosis for breast-conserving therapy.
Area of Science:
- Oncology
- Pathology
- Immunohistochemistry
Background:
- Mammography and breast-conserving therapy highlight the importance of classifying intraductal carcinoma (IDC).
- Distinguishing between comedo and noncomedo variants of IDC is crucial for prognosis.
Purpose of the Study:
- To define the immunophenotype of comedo versus noncomedo intraductal carcinoma (IDC) using histochemical markers.
- To investigate patterns of angiogenesis in relation to IDC subtypes.
Main Methods:
- Analysis of 43 intraductal carcinoma (IDC) samples.
- Utilized histochemical markers to assess immunophenotype, including estrogen receptor, progesterone receptor, p53, HER-2/neu, type IV collagen, and laminin.
- Evaluated periductal angiogenesis.
Main Results:
- Comedo carcinomas showed more frequent negative estrogen and progesterone receptor reactions and more positive p53 and HER-2/neu reactions compared to noncomedo variants.
- Basement membrane staining for type IV collagen and laminin was discontinuous in most IDCs, with a trend toward more intense staining in comedo types.
- Periductal angiogenesis was more pronounced in comedo carcinomas, though not significantly related to IDC type.
Conclusions:
- Immunophenotypic differences correlate with the structural classification of intraductal carcinoma (IDC).
- IDC immunophenotyping can aid in subclassifying tumors.
- Immunophenotype may serve as a prognostic indicator for local control in patients undergoing breast-conserving therapy.