(99m)Tc-DTPA uptake in clear-cell renal carcinoma metastases.

A 73-year-old male was diagnosed with clear-cell renal carcinoma in 2002. He had right nephrectomy, developing thereafter metastases in both adrenal glands and in the right gluteus region. He received immunotherapy and remained with stable diseases until august 2011, when suddenly unfold an unstable condition, developing a renal failure with elevation of creatinine levels and need of dialysis. Renal scintigraphy with 99mTc-DTPA (technetium-(99m)diethylene triamine pentaacetic acid) was performed to evaluate the function of the remaining kidney; the dynamic flow images showed two abnormal areas of increased uptake of 99mTc-DTPA (Fig. 1), corresponding to metastatic localizations at the right