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In response to the letter from Morris J. Wizenberg, MD, with regard to my paper entitled the "Occult Primary Tumor," the main purpose of the paper was to present a discussion of the occult primary tumor and what we consider its proper definition and how patients were selected for the category of occult primary tumors. In no way can the data be said to be statistically significant because of the small number of patients involved. It is extremely difficult to collect a large series of patients in the particular category of occult primary tumors. The largest previous series of 127 patients was reported from the M. D. Anderson Hospital. In reporting the University of Michigan experience, it is only intended to indicate what trends were noted in the data. Because of the large numbers of physicians involved in the care of these patients and the varying attitudes toward the work-up
WINEGAR LK. Occult Primary Tumor-Reply. Arch Otolaryngol. 1974;99(4):309. doi:10.1001/archotol.1974.00780030319020
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