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Serous Borderline Tumor : Pathology

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Serous borderline tumors of the testis are unilocular or multilocular cysts filled with clear straw-colored fluid. Grossly, the inner surface of the cyst shows papillary excrescences with varying degrees of complexity. The papillary structures have fibrovascular cores and show a hierarchical branching pattern from large to progressively smaller papillae and ultimately leading to smaller detached tufts of epithelial cells in clef-like spaces.

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