Immunosuppressive acidic protein detects high nuclear grade localized renal cell carcinoma.
OBJECTIVE
To identify a potentially useful preoperative predictor of high nuclear grade renal cell carcinoma (RCC).


METHODS
Our investigation consisted of 181 patients with histologically confirmed clear cell RCC. The positive predictive value, sensitivity, and specificity for detecting nuclear grade RCC were calculated individually for the largest tumor diameter. Hemoglobin, alkaline phosphatase, C-reactive protein, ferritin, and immunosuppressive acidic protein (IAP) levels were also determined in all patients preoperatively.


RESULTS
The distribution of patients by nuclear grade was 74 patients (41%) with grade 1, 75 (41%) with grade 2, and 32 (18%) with grades 3 and 4. With respect to sensitivity, tumor diameter detected 28 (87.5%) of 32 high nuclear grade RCC specimens, and hemoglobin, C-reactive protein, alkaline phosphatase, ferritin, and IAP detected 10 (31.2%), 25 (78.1%), 8 (25.0%), 16 (50%), and 27 (84.3%) of 32, respectively. Multiple logistic regression analysis showed that a higher than normal C-reactive protein and IAP was associated with a 252% and 405% increase in the odds of a high nuclear grade, respectively. In the Stage T1 cases, elevated IAP was also associated with a 989% increase in the odds of a high nuclear grade.


CONCLUSIONS
IAP level may be a useful predictor for detecting high nuclear grade localized RCC preoperatively.
Kawata
Nozomu
N
Department of Urology, Nihon University School of Medicine, Tokyo, Japan. asahigen@med.nihon-u.ac.jp
Yamaguchi
Kenya
K
Hirakata
Hitoshi
H
Hachiya
Takahiko
T
Yoshida
Toshio
T
Takimoto
Yukie
Y
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000097:blood*; D002292:Carcinoma, Renal Cell / Q000097:blood* / Q000473:pathology*; D005260:Female; D006801:Humans; D007680:Kidney Neoplasms / Q000097:blood* / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D009363:Neoplasm Proteins / Q000097:blood*; D011237:Predictive Value of Tests
D014408:Biomarkers, Tumor; D009363:Neoplasm Proteins; C030193:immunosuppressive acidic protein