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Trisomy 3 in renal cell carcinoma
1Department of Pathology, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA.
Summary
Trisomy 3, a rare chromosomal aberration in renal cell carcinoma (RCC), is now linked to specific features. This finding associates trisomy 3 with low-grade, low-stage papillary RCC tumors containing intracytoplasmic hemosiderin.
Area of Science:
- Oncology
- Cytogenetics
- Genetics
Background:
- Specific chromosomal aberrations are linked to distinct renal cell carcinoma (RCC) histologic types.
- Trisomy 3 has been infrequently reported in RCC and lacks established pathologic associations.
Purpose of the Study:
- To investigate the cytogenetic profile of renal cell carcinoma (RCC) and identify potential associations with trisomy 3.
- To characterize the pathologic features of RCC cases exhibiting trisomy 3.
Main Methods:
- Cytogenetic analysis was performed on 16 primary RCCs (8 papillary, 8 clear-cell) and 1 recurrent papillary tumor.
- Histologic and staging data were correlated with chromosomal findings, including trisomy 3 detection.
Main Results:
- Frequent trisomies (7, 17, 16, 20) were observed in papillary RCC; 3p deletions were common in clear-cell RCC.
- Trisomy 3 was detected in 5/8 papillary RCCs, often with other trisomies.
- Papillary RCCs with trisomy 3 were frequently low-grade, organ-confined, and showed intracytoplasmic hemosiderin; a single clear-cell RCC with trisomy 3 shared these features.
Conclusions:
- Trisomy 3 occurs in a subset of renal cell carcinomas.
- Trisomy 3 may be associated with specific clinicopathologic features, including low-grade, low-stage papillary tumors with intracytoplasmic hemosiderin.