BENIGN BREAST PATHOLOGY:

THE FIBROADENOMA

The human breast has many types of benign epithelial lesions. These are examples of benign breast tumors. The fibroadenoma illustrated here is the most common benign tumor of the human female breast. It is typically found in the younger woman. Mice rarely have these types of lesions.

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Slide 52. An expansile mass cut into halves is composed of dense white tissue typical of a FIBROADENOMA. It is seen with the naked eye.
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Slide 53. In this bisected gross specimen of a fibroadenoma the arrow points to the surrounding compressed breast stroma.

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Slide 54. The histologic slide shows one lobule that has been converted into a fibroadenoma by overgrowth of stroma. Photographed at 6.3x magnification.
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Slide 55. At higher magnification the stretched out ductules are seen. The arrow points to the interface between the fibroadenoma and the compressed normal breast tissue. Photographed at 63x magnification.

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Slide 56. The fibroadenoma is delineated by a black line from the normal breast tissue. Photographed at 1.4x magnification.
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Slide57. Contrast the normal lobules with the stretched ductules in the fibroadenoma. Photographed at 10x magnification.

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Slide 58. Another histologic pattern of a fibroadenoma where knobs of stroma compress the ductules. Photographed at 63x magnification.

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slide52.jpg 403.62 Kb Slide 52. An expansile mass cut into halves is composed of dense white tissue typical of a FIBROADENOMA. It is seen with the naked eye.	slide53.jpg 578.50 Kb Slide 53. In this bisected gross specimen of a fibroadenoma the arrow points to the surrounding compressed breast stroma.
slide54.jpg 652.56 Kb Slide 54. The histologic slide shows one lobule that has been converted into a fibroadenoma by overgrowth of stroma. Photographed at 6.3x magnification.	slide55.jpg 701.50 Kb Slide 55. At higher magnification the stretched out ductules are seen. The arrow points to the interface between the fibroadenoma and the compressed normal breast tissue. Photographed at 63x magnification.
slide56.jpg 835.04 Kb Slide 56. The fibroadenoma is delineated by a black line from the normal breast tissue. Photographed at 1.4x magnification.	slide57.jpg 824.03 Kb Slide57. Contrast the normal lobules with the stretched ductules in the fibroadenoma. Photographed at 10x magnification.
slide58.jpg 642.20 Kb Slide 58. Another histologic pattern of a fibroadenoma where knobs of stroma compress the ductules. Photographed at 63x magnification.