A Case of Fibrous Pseudotumor in the Scrotum: Challenge for Diagnosis and Testicular Preservation

Figure 2

Macro- and microscopic findings of the fibrous pseudotumor. Macroscopic findings showed many paratesticular white pedicle masses (a). We excised the paratesticular white masses (b) and evaluated them via frozen section (scale bar = 1 cm). After it was determined that the masses were not malignant, the tunica vaginalis was excised and they were totally removed. Pathological findings showed the proliferation of typical fibroblasts distributed in multidirectional bundles of dissociated collagen fibers (c). Immunohistochemical staining was negative for D2-40 (mesothelioma, (d)), calretinin (mesothelioma, (e)), β-catenin (desmoid-type fibromatosis, (f)), and anaplastic lymphoma kinase (ALK and inflammatory myofibroblastic tumor, (g)).

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