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DIFFERENTIAL DIAGNOSIS
Mixed tumor (presence of ducts, myxoid and chondroid areas)
Clear cell adenocarcinoma (infiltrative pattern and cellular atypia)
Nerve sheath tumor (lack of cytokeratin)
Fibrous histiocytoma (lack of cytokeratin)
Nodular fascitis (lack of cytokeratin)
Synovial sarcoma (nuclear abnormalities. Increase mitotic activity, infiltrative pattern)
Leiomyoma and leiomyosarcoma (lack of cytokeratin)
Hemangioperiocytoma (lack of cytokeratin)
Paraganglioma (lack of cytokeratin)
Metastatic renal cell carcinoma (absence of infiltrative pattern and nuclear abnormalities)
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Slide 35
