Related Experiment Video
Updated: Aug 9, 2026
The Use of Reverse Phase Protein Arrays (RPPA) to Explore Protein Expression Variation within Individual Renal Cell Cancers
Published on: January 22, 2013
The use of molecular genetic analysis in the diagnosis of renal cell carcinoma
J P Long1, P Anglard, J R Gnarra
1Urologic Oncology Section, Surgery Branch, National Cancer Institute, Bethesda, MD 20892.
Abstract:
The most common genetic aberration seen in nonpapillary renal cell carcinoma is believed to be the loss or inactivation of allelic material on the short arm of chromosome 3 (3p). Two patients underwent nephrectomy at our institution, each initially receiving a histologic diagnosis of renal cell carcinoma. Molecular analysis of these tissues revealed no genetic deletion on 3p, prompting further histologic and immunohistochemical evaluation of the original specimens. These additional studies confirmed alternate histologies other than renal cell carcinoma in each case. These data suggest that the loss of genetic material on the short arm of chromosome 3 may be specific for nonpapillary renal cell carcinoma. Molecular analysis may prove to be a useful adjunct in establishing the diagnosis in renal neoplasms with equivocal histologies.
Insights
Loss of chromosome 3p genetic material is specific to nonpapillary renal cell carcinoma. Molecular analysis aids in diagnosing renal neoplasms with unclear histology.
Area of Science:
- Oncology
- Genetics
- Nephrology
Background:
- Nonpapillary renal cell carcinoma (NRCC) is frequently associated with loss or inactivation of genetic material on chromosome 3p.
- Accurate diagnosis of renal neoplasms is crucial for appropriate treatment and prognosis.
Observation:
- Two patients with initial diagnoses of renal cell carcinoma showed no 3p deletions via molecular analysis.
- Further histological and immunohistochemical review revealed alternative diagnoses in both cases.
Findings:
- The absence of 3p genetic deletion in these cases suggests it is specific to nonpapillary renal cell carcinoma.
- This finding highlights the importance of comprehensive diagnostic approaches for renal tumors.
Implications:
- Molecular analysis can serve as a valuable tool for diagnosing renal neoplasms, especially those with ambiguous histopathology.
- Distinguishing between different renal tumor subtypes is critical for targeted therapies and improved patient outcomes.
