DOI: 10.1097/rlu.0000000000004729 ISSN: 1536-0229

99mTc-MIBI SPECT/CT Evaluation of a Renal Collision Tumor

Adil A. Ali, Thangalakshmi Sivathapandi, Ritu Gupta, Viraj A. Master, Charles Marcus
  • Radiology, Nuclear Medicine and imaging
  • General Medicine


Preoperative differentiation of oncocytomas from renal cell carcinoma (RCC) is often challenging. 99mTc-MIBI imaging could play a potential role in differentiating oncocytoma from RCC, which in turn could guide surgical decision-making. We present the use of 99mTc-MIBI SPECT/CT to characterize a renal mass in a 66-year-old man with a complex medical history, including history of bilateral oncocytomas. 99mTc-MIBI SPECT/CT showed features suspicious of a malignant tumor, which was confirmed postnephrectomy as a chromophobe and papillary RCC collision tumor. This case supports 99mTc-MIBI imaging for preoperative differentiation of benign versus malignant renal tumors.

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