The New England Journal of Medicine Downloaded from nejm.org at UNIVERSITY OF PITTSBURGH - MAIN on November 15, 2015. For personal use only. No other uses without permission. Copyright © 1992 Massachusetts Medical Society. All rights reserved.

The New England Journal of Medicine Downloaded from nejm.org at UNIVERSITY OF PITTSBURGH - MAIN on November 15, 2015. For personal use only. No other uses without permission. Copyright © 1992 Massachusetts Medical Society. All rights reserved.

Head and neck cancer with an occult primary tumor.

The New England Journal of Medicine Downloaded from nejm.org at UNIVERSITY OF PITTSBURGH - MAIN on November 15, 2015. For personal use only. No other...
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