Malignant juxtaglomerular cell tumor

Juxtaglomerular Cell Tumor Mimicking Renal Cell Carcinoma on 99mTc-MIBI SPECT/CT

“…Postcontrast transverse CT (B) in the corticomedullary phase showed significant enlargement of the renal mass (arrow) measuring 8.3 cm in maximum diameter suggestive of malignancy. 3,4 FIGURE 2. 99m Tc-MIBI SPECT/CT was recommended for characterizing the renal mass.…”

“…13 It is typically benign, and only rare cases are malignant. 3,4,12 The imaging features of juxtaglomerular cell tumor are nonspecific. The tumor shows hypodensity or isodensity on precontrast CT, and hypovascularity on postcontrast CT in the early phase and progressive enhancement in the delayed phase.…”

“…A follow-up contrast-enhanced abdominal CT was performed 31 months after laparoscopic microwave ablation. Postcontrast transverse CT ( B ) in the corticomedullary phase showed significant enlargement of the renal mass (arrow) measuring 8.3 cm in maximum diameter suggestive of malignancy 3,4 …”

“…The tumor arises from modified smooth muscle cell of the juxtaglomerular apparatus with ultrastructural features of both endocrine and smooth muscle cells 13 . It is typically benign, and only rare cases are malignant 3,4,12 . The imaging features of juxtaglomerular cell tumor are nonspecific.…”