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Parotid and thyroid gland cancers in patients with ataxia-telangiectasia.

This study describes the clinicopathologic features of parotid and thyroid gland cancers in patients with ataxia-telangiectasia (AT). The medical records of 412 AT patients were reviewed to identify those patients who developed parotid or thyroid gland cancers. Presenting features, diagnoses, types of therapy, risk factors, and other primary cancers were analyzed. Five patients with parotid or thyroid gland cancers were identified. Three had parotid (2 mucoepidermoid and 1 acinic cell) and 2 had thyroid gland (1 papillary and 1 follicular) cancers. Four patients presented with head and neck masses and 1 had an occult papillary thyroid carcinoma. Four patients had more than one primary cancer. The only mode of therapy was surgery. The 2 patients with mucoepidermoid carcinoma had complete parotidectomies. One is alive without any evidence of disease 12 months after diagnosis and 1 died of refractory lymphoma without any evidence of mucoepidermoid carcinoma at autopsy. The patient with acinic cell carcinoma had a parotid biopsy only. The 2 patients with thyroid cancer were diagnosed at autopsy. The results indicate that patients with AT are at risk for developing multiple primary cancers including those of the parotid and thyroid gland, and should be evaluated for such primaries.

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