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Wayne M. Koch, MD; Himanshu Patel, MD; Joseph Brennan, MD; Jay O. Boyle, MD; David Sidransky, MD

Arch Otolaryngol Head Neck Surg. 1995;121(3):262-265.

Abstract
Objective
While squamous cell carcinoma of the head and neck (HNSCC) most commonly affects individuals in the fifth to seventh decades of life, it occasionally arises in older patients. Biologic and epidemiologic factors of HNSCC in elderly patients have been investigated to shed light on the process of neoplastic transformation in that population.

Design
The medical records of patients with new onset of HNSCC presenting between 1988 and 1993 were reviewed retrospectively.

Setting
Tertiary-care hospital-based clinic.

Patients
Eighty-one individuals who developed HNSCC of the upper aerodigestive tract after their 75th birthday constituted the study group. A control group consisting of 102 patients who developed HNSCC between the ages of 40 and 70 years was also analyzed.

Main Outcome Measure
Information about each individual's tobacco and ethanol exposure, family history of cancer, history of second primary cancer, treatment provided, and current disease status were derived from the medical record. The presence or absence of p53 gene mutation was tabulated for a subset of individuals in both the elderly and the middle-aged groups.

Results
The elderly patients had a significantly lower degree of alcohol and tobacco exposure, but a significantly higher rate of second primary cancers, especially in sites outside the upper aerodigestive tract. There was no difference in the incidence of cancer in first-degree relatives in the two groups. These findings were interpreted in light of results from our laboratory examining the incidence of p53 gene mutation in a large number of patients with HNSCC. A significantly higher percentage of tumors from the younger group contained a p53 gene mutation. Major surgery was an integral part of the treatment plan for most of the older patient group despite their advanced age.

Conclusions
These findings suggest that HNSCC arising after the seventh decade of life less frequently involves a genetic change commonly found in younger patients. Heavy carcinogen exposure and p53 gene mutations are present less often in elderly individuals, whereas this group appears to be more susceptible to multiple cancers. The precise biologic factors involved in neoplastic transformation in this older population await discovery. Since aggressive therapy can be successfully tolerated by many elderly patients, an individualized approach to treatment is advocated.

(Arch Otolaryngol Head Neck Surg. 1995;121:262-265)

Author Affiliations
From the Department of Otolaryngology—Head and Neck Surgery, The Johns Hopkins University School of Medicine, Baltimore, Md.

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