Frequency and experience with carcinoma of the thyroid at a private, a veterans administration, and a university hospital

Abstract

We evaluated the treatment experiences with thyroid carcinoma at a private, a Veterans Administration, and a University hospital to determine the frequency, treatment, and outcome of patients with this uncommon malignant tumor. All 120 patients with thyroid carcinoma were identified through hospital tumor registries between 1953 and 1988, representing 0.3% of the total cancer registry cases during this period. Well-differentiated carcinoma of the thyroid represented 73%, medullary carcinoma 7%, poorly differentiated carcinoma 18%, and Hürthle cell carcinoma 2% of histologic varieties. Seventy-eight percent of patients were treated initially by surgery or by surgery plus postoperative irradiation. The remaining patients received other treatment. At 10 years after treatment, 90% of patients with well-differentiated carcinoma survived, while only 20% of patients with medullary and poorly differentiated carcinoma survived. Sixty percent of recurrences for all histologic types appeared within the first 12 months after treatment. Patients with well-differentiated carcinoma had sporadic recurrences over a 21-year-period. Recognition of these time intervals allows for better follow-up management.