Related Experiment Video
Updated: Jun 12, 2026

In Vivo, Percutaneous, Needle Based, Optical Coherence Tomography of Renal Masses
Published on: March 30, 2015
Multidetector computed tomographic features of oncocytic papillary renal cell carcinoma, a new subtype
Gary Tse1, Daniel S Chow, Margaret Hsu
1Georgetown University School of Medicine, Washington, DC, USA. ggt9@georgetown.edu
Abstract:
The following report describes the computed tomographic (CT) features of oncocytic papillary renal cell carcinoma (OPRCC), a new subtype. An experienced genitourinary pathologist identified each tumor as type 1 or 2, oncocytic, or other. Two radiologists independently reviewed CT images and assessed maximal tumor diameter, degree of homogeneity, calcification, enhancement, and growth pattern. The 6 OPRCC lesions varied from 1.8 to 5 cm in diameter with a mean of 3.5 cm. Three of the oncocytic lesions were staged T1a, 2 T1b, and 1 T3a. All lesions displayed exophytic growth and were confined to the kidney. Five of the 6 lesions were smooth, and 1 was lobular. Four were homogenously enhancing, whereas 2 were heterogeneously enhancing. The mean (SD) corticomedullary phase enhancement was 70.6 (21.7) HU, nephrographic phase was 69.9 (13.3) HU, and excretory phase was 58.7 (6) HU. In conclusion, OPRCC is a newly described subtype that has CT features similar to type 1 papillary renal cell carcinoma.
Related Concept Videos
Renal Corpuscle
Glomerulus: Structure and Function
The glomerulus is a tiny, intricate network of capillaries located at the beginning of the nephron. It's enveloped by the Bowman's capsule and receives its blood supply from an afferent arteriole, which divides into numerous capillaries...
Renal Tubule and Collecting Duct
Proximal Convoluted Tubule (PCT):
The PCT is the initial segment of the renal tubule, extending from the Bowman's capsule that encloses the glomerulus. Its convoluted structure and microvilli-lined cells increase the surface area for reabsorption. The PCT reabsorbs glucose, amino acids, sodium, and water from the filtrate, ensuring essential...
Imaging Studies I: Kidney, Ureter, and Bladder Studies
Imaging Studies III: Computed Tomography

