Type 1 papillary renal cell carcinoma: differentiation from Type 2 papillary RCC on multiphasic MDCT

Jonathan R Young, Heidi Coy, Michael Douek, Pechin Lo, James Sayre, Allan J. Pantuck, Steven S. Raman

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Purpose: To investigate whether multiphasic MDCT enhancement can help differentiate type 1 papillary renal cell carcinoma (RCC) from type 2 papillary RCC. Methods: With IRB approval for this HIPAA-compliant retrospective study, we derived a cohort of 36 type 1 papillary RCCs and 33 type 2 papillary RCCs with preoperative multiphasic MDCT with up to four phases (unenhanced, corticomedullary, nephrographic, and excretory) from 2000 to 2013. Following segmentation, a computer-assisted detection (CAD) algorithm selected a 0.5 cm-diameter region of maximal attenuation within each lesion in each phase; a 0.5 cm-diameter region of interest was manually placed on uninvolved renal cortex in each phase. The relative attenuation of each lesion was calculated as [(Lesion attenuation−cortex attenuation)/cortex attenuation] × 100. Absolute and relative attenuation values were compared using Mann–Whitney tests with Bonferroni correction for multiple comparisons. Results: Relative excretory phase attenuation of type 2 papillary RCCs was significantly greater than that of type 1 papillary RCCs (2.0 vs. −18.3, p = 0.005). Relative excretory phase attenuation differentiated type 1 papillary RCCs from type 2 papillary RCCs with an accuracy of 73% (36/49), sensitivity of 87% (26/30), positive predictive value of 74% (26/35), and negative predictive value of 71% (10/14). Conclusion: Multiphasic MDCT enhancement may assist in differentiating type 1 papillary RCCs from type 2 papillary RCCs, if prospectively validated.

Original languageEnglish (US)
Pages (from-to)1911-1918
Number of pages8
JournalAbdominal Radiology
Volume42
Issue number7
DOIs
StatePublished - Jul 1 2017
Externally publishedYes

Keywords

  • Multidetector computed tomography
  • Renal cell carcinoma
  • Type 1 papillary renal cell carcinoma
  • Type 2 papillary renal cell carcinoma

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging
  • Gastroenterology
  • Urology

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