Abstract
BACKGROUND:
Fibroepithelial tumors of the breast including fibroadenomas and phylloides tumors arise from
epithelial and stromal components of the terminal duct-lobular unit. Fibroadenoma is the commonest
benign neoplasm of the female breast. These tumors are found as early as puberty. Mammary
phylloides tumors are uncommon stromal-epithelial neoplasms and are divided into benign,
borderline malignant and frankly malignant groups on the basis of their histological features.
OBJECTIVE:
The aim of this study is to evaluate the role of morphologic diagnosis in a series of fibroepithelial
(biphasic) tumors of the breast including fibroadenoma and phylloides tumor, highlighting the
morphological and Histopathological variants of fibroadenoma, and the most recent histological
classification criteria of phylloides tumors.
PATIENTS AND METHODS:
This is a retrospective study including 250 cases of fibroepithelial tumors of the female breast, from
October 2007 to September 2008. Cases were taken from private laboratories. All cases were
excisional biopsy, the specimens were already fixed in 10% formalin and paraffin embedded.
Sections of 4 microns were made from the paraffin blocks and stained with hematoxyllin and eosin
stain and examined microscopically.
RESULTS:
Two-hundred and fifty cases of mammary fibroepithelial tumors were reviewed in this study. The age
of the patients ranged between 14-49 years, and the tumor size ranged between 1.5-20 cm. The cases
were histologically classified into: 220(88%) cases of fibroadenoma(FA) and 30(12%) cases of
phylloides tumor(PT). Additional morphological features of fibroadenoma were: fifteen(6.8%)cases
juvenile fibroadenoma, infarction in eight(3.6%) cases, lactational changes in ten(4.5%) cases,
multinucleated giant cells in the stroma in six(2.7%) cases, prominent myxoid changes in three(1.4%)
cases, features of fibrocystic changes in the surrounding in 14(6.4%) cases, cellular stroma in
eight(3.6%) cases, apocrine metaplasia in 26(11.9%) cases, hyalinization and calcification of the
stroma in 14(6.4%) cases, presence of adipose tissue , muscle or cartilage in 18(8.2%) cases, atypical
epithelial hyperplasia in four(1.8%) cases, and ordinary fibroadenomas (non-otherwise specific) in
94(42.7%) cases. Multiple fibroademnomas were found in 20(9.1%) cases. Histological classification
of the phylloides tumors showed 20(66.7%) benign cases, six(20%) cases borderline malignant and
four(13.3%) malignant cases.
CONCLUSION:
Fibroadenoma is the commonest fibroepithelial tumor of female breast, phylloides tumor is an
uncommon neoplasm which is usually benign but malignant variant exists.
Fibroepithelial tumors of the breast including fibroadenomas and phylloides tumors arise from
epithelial and stromal components of the terminal duct-lobular unit. Fibroadenoma is the commonest
benign neoplasm of the female breast. These tumors are found as early as puberty. Mammary
phylloides tumors are uncommon stromal-epithelial neoplasms and are divided into benign,
borderline malignant and frankly malignant groups on the basis of their histological features.
OBJECTIVE:
The aim of this study is to evaluate the role of morphologic diagnosis in a series of fibroepithelial
(biphasic) tumors of the breast including fibroadenoma and phylloides tumor, highlighting the
morphological and Histopathological variants of fibroadenoma, and the most recent histological
classification criteria of phylloides tumors.
PATIENTS AND METHODS:
This is a retrospective study including 250 cases of fibroepithelial tumors of the female breast, from
October 2007 to September 2008. Cases were taken from private laboratories. All cases were
excisional biopsy, the specimens were already fixed in 10% formalin and paraffin embedded.
Sections of 4 microns were made from the paraffin blocks and stained with hematoxyllin and eosin
stain and examined microscopically.
RESULTS:
Two-hundred and fifty cases of mammary fibroepithelial tumors were reviewed in this study. The age
of the patients ranged between 14-49 years, and the tumor size ranged between 1.5-20 cm. The cases
were histologically classified into: 220(88%) cases of fibroadenoma(FA) and 30(12%) cases of
phylloides tumor(PT). Additional morphological features of fibroadenoma were: fifteen(6.8%)cases
juvenile fibroadenoma, infarction in eight(3.6%) cases, lactational changes in ten(4.5%) cases,
multinucleated giant cells in the stroma in six(2.7%) cases, prominent myxoid changes in three(1.4%)
cases, features of fibrocystic changes in the surrounding in 14(6.4%) cases, cellular stroma in
eight(3.6%) cases, apocrine metaplasia in 26(11.9%) cases, hyalinization and calcification of the
stroma in 14(6.4%) cases, presence of adipose tissue , muscle or cartilage in 18(8.2%) cases, atypical
epithelial hyperplasia in four(1.8%) cases, and ordinary fibroadenomas (non-otherwise specific) in
94(42.7%) cases. Multiple fibroademnomas were found in 20(9.1%) cases. Histological classification
of the phylloides tumors showed 20(66.7%) benign cases, six(20%) cases borderline malignant and
four(13.3%) malignant cases.
CONCLUSION:
Fibroadenoma is the commonest fibroepithelial tumor of female breast, phylloides tumor is an
uncommon neoplasm which is usually benign but malignant variant exists.
Keywords
fibroadenoma
fibroepithelial tumors
phylloides tumor.