A 62-year-old man with a 35-pack-year smoking history and occupational exposure to trichloroethylene presents with painless gross hematuria, right flank pain, a palpable right flank mass, fatigue, and 6 kg weight loss over 3 months. Laboratory investigations show hemoglobin 17.8 g/dL, calcium 11.6 mg/dL, and elevated LDH. Multiphasic contrast-enhanced CT of the abdomen is performed. The structure marked **A** in the diagram—a heterogeneously enhancing exophytic right renal mass measuring 8 cm with avid arterial-phase enhancement and central necrosis—is most consistent with which histological subtype of renal cell carcinoma?
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