PMC7119338_01
Plain CT (A) and contrast-enhanced scan (B) of the kidney. The arrow shows a mass of 5.5 x 5.0 x 4.0 cm on the left side.
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F1
As autoimmune encephalitis is cancer-related, CT scans of the chest, the abdomen, and the pelvis were performed on April 19, 2017, which revealed an exophytic mass on the left kidney and enhanced abdomen CT scans confirmed it as clear cell renal carcinoma (Figure 1).
A pathological study of the mass on the left kidney confirmed it as renal cell carcinoma, clear cell type. (A) Low magnification. (B) High magnification. The cells have a clear cytoplasm, surrounded by a distinct cell membrane, and contain round and uniform nuclei.
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F2
The pathology report showed renal cell carcinoma, clear cell type, and Fuhrman grade of 2, 5.5 x 5.0 x 4.0 cm (Figure 2).