Fig. 1CT scan of the kidney and a whole body FDG-PET scan of the patient. (A), (B) About 4.1×3.4 cm sized heterogeneous attenuating mass was detected on the anterior lip of the left kidney. (C), (D) A mass with high FDG uptake was seen on the lateral cortex area of the left kidney. The mass corresponded to the mass detected at the CT scan of the kidney.
Fig. 2Gross and microscopic pathology of the kidney mass. A subcapsular protruding mass was found at the mid-portion of the left kidney. (A) Microscopic examination of the resected kidney showed a metastatic squamous cell carcinoma, which coincided with the histological findings of the previously resected esophageal carcinoma (H & E stain, B: ×200).