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BREAST CYTOPATHOLOGY

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112 4. Primary Malignant Tumors

Figure 4.31. Tubular carcinoma. This composite image shows

a pathognomonic feature of the tumor, that is, formation of a

rigid tubular architecture (“hose pipe–like”). Also notice the

characteristic right angle branching of the tubules. (Smear,

Papanicolaou.)

Figure 4.32. Tubular carcinoma. Higher magnification of the tubular

architecture. The carcinoma cells are uniform and appear low grade.

Noticeable features include a rigid architecture with parallel walls

and open lumen at the end. (Smear, Papanicolaou.)

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