Abstract:
AIMS:The preoperative differentiation of malignant renal cystic tumours from benign lesions is critical, and it remains a common diagnostic problem. The aim was to examine if the Carbonic anhydrase 9 (CA9) level in cyst fluid can provide a molecular diagnosis of malignant cyst. METHODS AND RESULTS:Twenty-eight patients with a cystic renal mass were included. Fine-needle aspiration was performed to obtain the fluid. Postoperative pathology confirmed that there were 16 cystic renal cell carcinomas. Twelve benign cystic tumours were used as controls. One hundred microlitres of supernatant of cyst fluid was used to measure the CA9 protein level, which was measured by an enzyme-linked immunosorbent assay technique. CA9 was strongly detected and considered as positive in the cyst fluid of all 16 cystic malignant tumours (>1000 pg/ml), whereas its expression was negative in 11/12 benign cystic tumours (<300 pg/ml). The difference in percentages of positive CA9 between malignant and benign renal cystic tumours was significant (P < 0.001). CONCLUSION:The fluid of malignant cystic renal tumours contains a high level of CA9 protein. The measurement of CA9 level in cyst fluid may be used as a molecular diagnosis for differentiation between malignant and benign renal cystic masses.
journal_name
Histopathologyjournal_title
Histopathologyauthors
Li G,Feng G,Cuilleron M,Zhao A,Gentil-Perret A,Cottier M,Genin C,Tostain Jdoi
10.1111/j.1365-2559.2009.03302.xsubject
Has Abstractpub_date
2009-06-01 00:00:00pages
880-4issue
7eissn
0309-0167issn
1365-2559pii
HIS3302journal_volume
54pub_type
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