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  • Title: Serum squamous cell carcinoma antigen and CYFRA 21-1 in cervical cancer treatment.
    Author: Pras E, Willemse PH, Canrinus AA, de Bruijn HW, Sluiter WJ, ten Hoor KA, Aalders JG, Szabo BG, de Vries EG.
    Journal: Int J Radiat Oncol Biol Phys; 2002 Jan 01; 52(1):23-32. PubMed ID: 11777619.
    Abstract:
    PURPOSE: To analyze whether serum squamous cell carcinoma (SCC) antigen and cytokeratin-19 fragments (CYFRA) levels can assist in selecting patients with locally advanced cervical cancer who will benefit from combined treatment or additive surgery. METHODS AND MATERIALS: Of 114 patients with cervical cancer Stage IB-IV, the first 39 patients received radiotherapy, the following 75 patients received identical radiotherapy plus concomitant chemotherapy (3 cycles of carboplatin and 5-fluorouracil). SCC antigen and CYFRA 21-1 serum levels were measured before treatment, after therapy, and during follow-up. Baseline tumor markers were related to tumor stage and size and clinical outcome. RESULTS: Before treatment, SCC antigen was elevated (>1.9 microg/L) in 60% and CYFRA 21-1 (>2.2 microg/L) in 46% of patients. For all patients, disease-free survival (DFS) was better after combined treatment (67% vs. 43%, p < 0.0005). For patients with elevated baseline SCC antigen, DFS was better after combination therapy (67% vs. 27%, p = 0.001) which resulted more frequently in a normal SCC antigen (93% vs. 65%, p = 0.004). In contrast, in those with a normal baseline CYFRA 21-1, combined therapy resulted in a better DFS (p = 0.04). Patients who achieved a normal SCC antigen or CYFRA 21-1 after treatment had a better DFS (respectively 63 vs. 17% and 64 vs. 30%). Elevated SCC antigen posttreatment indicated residual tumor in 11/12 patients (92%), elevated CYFRA 21-1 in 7/10 patients (70%). Forty-seven patients had a tumor recurrence. At recurrence, SCC antigen was raised in 70% and CYFRA 21-1 in 69%. CONCLUSIONS: In patients with an elevated pretreatment SCC antigen, SCC antigen normalized more frequently with combined treatment and those patients had a better DFS. Elevated SCC antigen or CYFRA 21-1 levels after treatment completion indicated residual tumor in respectively 92% and 70%. The presence of elevated posttreatment levels of SCC antigen or CYFRA 21-1 indicates the need for additional salvage surgery. SCC antigen proved to be superior to CYFRA 21-1 in predicting DFS and disease recurrence.
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