The patient underwent an urgent appendecectomy and elective left nephrectomy. The histopathology evaluation of the left renal mass confirmed papillary renal cell carcinoma, the second most common histological subtype of renal cell carcinoma (RCC).

On CT images, papillary renal cell carcinoma is characteristically less vascularized than the clear cell subtype, showing overall hypo-enhancement compared to the adjacent normal renal cortex.