Abstract
The duration of follow-up after treatment of oral squamous cell carcinoma and the frequency of routine visits are based on common usage rather than evidence-based practice. The purpose of this study was to determine the appropriate postoperative routine follow-up program in patients with oral squamous cell carcinoma. Three hundred four cases treated curatively mainly by surgery at Tokai University Hospital from 1994 to 2004 were analyzed. A secondary event was defined as a local recurrence, a regional recurrence, a distant metastasis, or a second primary cancer. To evaluate the follow-up program, data on the first tumor recurrence or first second primary tumor in the head and neck region or elsewhere in the body were used. Overall survival rate, disease-specific survival rate, relapse-free rate, and cumulative risk of developing a second primary cancer were estimated by the Kaplan-Meier product limit method. All relapse cases were detected within 3 years postoperatively, of which 86.3% were detected within 1 year. Most relapses were in the neck, and regional recurrences had a dismal salvage rate. Second primary cancers were constantly detected 1 to 10 years postoperatively. Follow-up should be performed more frequently in the first year, with 2 weekly follow-ups with monthly ultrasound examinations, and should be continued after 3 years to exclude the development of second primary cancers.
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