An assessment of risk factors for the development of a second primary malignancy in the head and neck.
This retrospective database study of 44,862 patients who had a history of a primary head and neck malignancy was conducted to identify any clinical variables that may predict the occurrence of a second primary head and neck malignancy. During a mean follow-up of 42.2 months, a second head and neck primary developed in 941 of these patients (2.1%). Statistical analyses revealed that a higher incidence of a second primary was associated with increased age and a location of the first primary in the larynx/hypopharynx, the oropharynx, a major salivary gland, or the nasopharynx. A lower incidence was associated with the presence of cervical nodal disease or treatment of the first primary with radiation therapy. Factors that had no effect on the risk of a second primary included sex, the size of the first primary tumor, a first-primary site in the oral cavity, and treatment of the first primary with cancer-directed surgery. The risk of a second primary head and neck cancer remained constant for at least 10 years.
Bhattacharyya
Neil
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Division of Otolaryngology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA. Neiloy@massmed.org
D002294:Carcinoma, Squamous Cell / Q000453:epidemiology / Q000209:etiology*; D016022:Case-Control Studies; D005260:Female; D006258:Head and Neck Neoplasms / Q000453:epidemiology / Q000209:etiology*; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D016609:Neoplasms, Second Primary / Q000453:epidemiology / Q000209:etiology*; D016016:Proportional Hazards Models; D012189:Retrospective Studies; D012307:Risk Factors; D012984:Software; D015996:Survival Rate