Book contents
- Frontmatter
- Contents
- Contributors
- Series foreword
- Preface to Carcinoma of the Kidney
- 1 Renal cell cancer: overview and immunochemotherapy
- 2 Pathology of adult renal parenchymal cancers
- 3 Familial and inherited renal cancers
- 4 Radiological diagnosis of renal cancer
- 5 Staging of renal cancer
- 6 The case for biopsy in the modern management of renal cancer
- 7 Imaging characteristics of unusual renal cancers
- 8 Surgery for renal cancer: current status
- 9 Ablation of renal cancer
- 10 Post-treatment surveillance of renal cancer
- 11 Imaging for nephron-sparing procedures
- Index
- Plate Section
- References
6 - The case for biopsy in the modern management of renal cancer
Published online by Cambridge University Press: 08 August 2009
- Frontmatter
- Contents
- Contributors
- Series foreword
- Preface to Carcinoma of the Kidney
- 1 Renal cell cancer: overview and immunochemotherapy
- 2 Pathology of adult renal parenchymal cancers
- 3 Familial and inherited renal cancers
- 4 Radiological diagnosis of renal cancer
- 5 Staging of renal cancer
- 6 The case for biopsy in the modern management of renal cancer
- 7 Imaging characteristics of unusual renal cancers
- 8 Surgery for renal cancer: current status
- 9 Ablation of renal cancer
- 10 Post-treatment surveillance of renal cancer
- 11 Imaging for nephron-sparing procedures
- Index
- Plate Section
- References
Summary
Introduction
In the past, focal renal biopsy had a limited role in the management of renal masses. Potential complications and an overestimated risk of seeding the biopsy tract dissuaded operators from biopsy, and when performed definitive results were uncommon. Hence, urologists presumed that solid renal lesions over 3 cm and complex cysts were predominantly renal cell carcinomas (RCC) and rarely performed biopsy before surgical procedures.
Attitudes have changed to renal biopsy for a number of reasons, firstly, histological techniques have become more reliable. The morphology, immunocytochemical, and genetic profiles of RCC and its subtypes have been better described. Immunohistochemistry and special stains and genetic test are available to help differentiate tumor subtypes. Oncocytoma, oncocytic cancers, RCC and fat poor angiomyolipomas (AML) can now be differentiated histologically. There has also been a downward-stage migration of renal tumors at diagnosis and a substantial fraction of contemporary solid renal masses are benign. In one study, 12.8% of solid renal masses were found to be benign. When stratified by size, the proportion of benign masses was 25% for masses smaller than 3 cm, 30% for masses smaller than 2 cm, and 44% for masses smaller than 1 cm. Furthermore, small solid benign renal masses cannot be reliably distinguished from malignant masses by means of imaging findings alone.
- Type
- Chapter
- Information
- Carcinoma of the Kidney , pp. 112 - 125Publisher: Cambridge University PressPrint publication year: 2007