FIBROADENOMA WITH INVASIVE LOBULAR CARCINOMA Figure 5-9 FIBROADENOMA WITH INVASIVE LOBULAR CARCINOMA A: The stroma of this fibroadenoma is considerably more cellular than is usual, yet the areas around the ducts have the appearance of a typical fibroadenoma. B: At high power, the cellularity is ... More about this image found in FIBROADENOMA WITH INVASIVE LOBULAR CARCINOMA A: The stroma of this fibroad...

CELLULAR FIBROADENOMA Figure 5-11 CELLULAR FIBROADENOMA A,B: Another example of a probable cellular fibroadenoma at low (A) and intermediate (B) power. This core needle biopsy specimen depicts a fibroepithelial lesion with a prominent pericanalicular growth pattern and hypercellular stroma; defin... More about this image found in CELLULAR FIBROADENOMA A,B: Another example of a probable cellular fibroade...

FIBROADENOMA Figure 5-3 FIBROADENOMA Another fibroadenoma with an intracanalicular growth pattern at intermediate (A) and high (B) power. The ducts are elongated and compressed. There is some condensation of the stroma around the ducts, suggesting a benign phyllodes tumor, but the absence of over... More about this image found in FIBROADENOMA Another fibroadenoma with an intracanalicular growth pattern ...

FIBROADENOMA WITH ATYPICAL DUCTAL HYPERPLASIA Figure 5-7 FIBROADENOMA WITH ATYPICAL DUCTAL HYPERPLASIA This fibroadenoma has a single focus of atypical ductal hyperplasia, recognizable as a monomorphic epithelial proliferation with polarization of the cells around cribriform spaces and microacini... More about this image found in FIBROADENOMA WITH ATYPICAL DUCTAL HYPERPLASIA This fibroadenoma has a sing...

CELLULAR FIBROADENOMA Figure 5-10 CELLULAR FIBROADENOMA A: At low power, this fibroadenoma appears to have greater stromal cellularity than most fibroadenomas. The predominantly pericanalicular growth pattern and absence of leaf-like architecture argues against a phyllodes tumor. B: High power d... More about this image found in CELLULAR FIBROADENOMA A: At low power, this fibroadenoma appears to have g...

JUVENILE FIBROADENOMA Figure 5-17 JUVENILE FIBROADENOMA A: At low power, this 4-cm fibroadenoma from a 14-year-old girl is remarkable for a circumscribed border, pericanalicular growth pattern, greater stromal cellularity, and more epithelial proliferation. B: Higher power shows the hypercellula... More about this image found in JUVENILE FIBROADENOMA A: At low power, this 4-cm fibroadenoma from a 14-ye...

COMPLEX FIBROADENOMA Figure 5-18 COMPLEX FIBROADENOMA A: Low-power view of a complex fibroadenoma with multiple areas of sclerosing adenosis and calcifications. B: Higher-power view of one of several areas of sclerosing adenosis. More about this image found in COMPLEX FIBROADENOMA A: Low-power view of a complex fibroadenoma with mult...

MYXOID FIBROADENOMA Figure 5-16 MYXOID FIBROADENOMA Low- (A) and high- (B) power images of a lobulated fibroadenoma with myxoid stroma and an intracanalicular growth pattern. More about this image found in MYXOID FIBROADENOMA Low- (A) and high- (B) power images of a lobulated fib...

FIBROADENOMA Figure 5-2 FIBROADENOMA A: Low-power magnification demonstrates the well-circumscribed border and compressed ducts of a fibroadenoma with an intracanalicular growth pattern. B: Higher-power view shows the bland stromal cells and benign ductal epithelium. More about this image found in FIBROADENOMA A: Low-power magnification demonstrates the well-circumscribe...

FIBROADENOMA Figure 5-1 FIBROADENOMA The well-circumscribed, lobulated appearance of the tumor is illustrated grossly. The surface appears to bulge out from the background fibroadipose tissue. There are areas of grooving that correspond to the slit-like ducts characteristic of fibroadenoma. (Cour... More about this image found in FIBROADENOMA The well-circumscribed, lobulated appearance of the tumor is ...

MYXOID FIBROADENOMA MIMICKING MUCINOUS CARCINOMA Figure 5-20 MYXOID FIBROADENOMA MIMICKING MUCINOUS CARCINOMA A: At higher power, a single gland present in a myxoid background has the potential to be misinterpreted as hypocellular mucinous carcinoma. B: Low-power examination permits appreciation... More about this image found in MYXOID FIBROADENOMA MIMICKING MUCINOUS CARCINOMA A: At higher power, a sin...

FIBROADENOMA WITH DUCTAL CARCINOMA IN SITU Figure 5-8 FIBROADENOMA WITH DUCTAL CARCINOMA IN SITU A: At low power, the epithelial areas within this fibroadenoma are more proliferative and show marked cytologic atypia. B: At high power, the ducts are expanded by a highly atypical epithelial prolif... More about this image found in FIBROADENOMA WITH DUCTAL CARCINOMA IN SITU A: At low power, the epithelial...

FIBROADENOMA: PERICANALICULAR PATTERN Figure 5-4 FIBROADENOMA: PERICANALICULAR PATTERN A: At low power, this core needle biopsy specimen of a benign stromal and epithelial tumor has numerous glands with more open rounded lumens compared with the compressed ducts of a fibroadenoma with an intracan... More about this image found in FIBROADENOMA: PERICANALICULAR PATTERN A: At low power, this core needle bi...

FIBROADENOMA Figure 5-5 FIBROADENOMA This high-power image shows the dual cell layer of the epithelial component of fibroadenoma; luminal epithelial cells with relatively abundant cytoplasm and round nuclei; and the peripheral, myoepithelial cell layer which is attenuated in this example with sca... More about this image found in FIBROADENOMA This high-power image shows the dual cell layer of the epithe...

FIBROADENOMA WITH USUAL DUCTAL HYPERPLASIA Figure 5-6 FIBROADENOMA WITH USUAL DUCTAL HYPERPLASIA A: Intermediate-power image of a core needle biopsy demonstrating a fibroadenoma with greater epithelial proliferation in some ducts. B: At high power, the characteristic features of cellular heterog... More about this image found in FIBROADENOMA WITH USUAL DUCTAL HYPERPLASIA A: Intermediate-power image of ...

FIBROADENOMA WITH PSEUDOANGIOMATOUS STROMAL HYPERPLASIA Figure 5-12 FIBROADENOMA WITH PSEUDOANGIOMATOUS STROMAL HYPERPLASIA More about this image found in FIBROADENOMA WITH PSEUDOANGIOMATOUS STROMAL HYPERPLASIA

HYALINIZED FIBROADENOMA Figure 5-15 HYALINIZED FIBROADENOMA This case has less stromal cellularity and more hyalinization, as well as several large calcifications. More about this image found in HYALINIZED FIBROADENOMA This case has less stromal cellularity and more hy...

FIBROADENOMA WITH STROMAL GIANT CELLS Figure 5-14 FIBROADENOMA WITH STROMAL GIANT CELLS A: Low power demonstrates a well-circumscribed fibroepithelial lesion with scattered large, hyperchromatic cells in the stroma. B,C: At intermediate (B) and high (C) power, it becomes apparent that these cell... More about this image found in FIBROADENOMA WITH STROMAL GIANT CELLS A: Low power demonstrates a well-cir...

FIBROADENOMA WITH SMOOTH MUSCLE DIFFERENTIATION Figure 5-13 FIBROADENOMA WITH SMOOTH MUSCLE DIFFERENTIATION A: At low power, this lesion appears to have areas of stromal expansion. B,C: At high power, these areas are seen to be expanded by short fascicles (B) and bundles of spindle cells (C) wit... More about this image found in FIBROADENOMA WITH SMOOTH MUSCLE DIFFERENTIATION A: At low power, this lesi...