Abstract：
OBJECTIVES:To elucidate the clinical significance of the HER-2 gene alterations in urine-exfoliated cells detected by fluorescence in situ hybridization (FISH) in patients with urothelial transitional cell carcinoma. METHODS:The relative increase of HER-2 (RI-HER2) and gain of chromosome 17 (G-17) in urine-exfoliated cells were examined using DNA probes for HER-2 and the chromosome 17 centromere in 103 patients. In addition, FISH analysis was performed using corresponding paraffin-embedded tissue sections from 45 cases to compare the results obtained using urine-exfoliated cells and those obtained using paraffin-embedded tissue. RESULTS:RI-HER2 and G-17 was found in 23 (22.3%) and 46 (44.6%) of 103 patients, respectively. RI-HER2 was significantly more frequent in tumors with two or more recurrences (40.7% versus 15.8%, P = 0.010) and in those with carcinoma in situ (CIS) (35.4% versus 15.9%, P = 0.029). G-17 was more frequent in high-grade tumors (69.1% versus 16.7%, P = 0.032), invasive tumors (63.6% versus 14.3%, P < 0.001), and in patients with CIS (77.1% versus 29.0%, P < 0.001). The positive rate for FISH (presence of RI-HER2 and/or presence of G-17) tended to be more frequent in FISH than in cytology. A comparison of the analyses using urine-exfoliated cells and paraffin-embedded tissue showed identical results in 36 (80.0%) of 45 cases. CONCLUSIONS:Numeric alterations of the chromosome 17 centromere in urine-exfoliated cells detected by FISH may reflect the malignant potential of urothelial carcinoma. In addition, a relative increase in HER-2 was associated with the number of recurrences and the presence of CIS.
journal_name
Urologyjournal_title
Urologyauthors
Inoue T,Sato K,Tsuchiya N,Matsuura S,Iinuma M,Habuchi T,Kato Tdoi
10.1016/j.urology.2004.05.004subject
Has Abstractpub_date
2004-09-01 00:00:00pages
617-21issue
3eissn
0090-4295issn
1527-9995pii
S0090429504005771journal_volume
64pub_type
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