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Case 134

A 76-year-old male with a lung mass:

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  1. What's the morphology impression?


    A: Non cancer, reactive

    B: Non carcinoma, histiocytic lesion

    C: Metastatic carcinoma

    D: Neuroendocrine tumor or paraganglioma

    E: Clear cell sarcoma


Answer

This is a case of metastatic clear cell carcinoma. The tumor is positive for CAIX and PAX8.

Case credit: UCSD Pathology

Author: Wangpan Jackson Shi, MD

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