Previous chemical studies in cancer of the skin have usually been drawn from homogeneous material: patients from a single public or private clinic or, less often, from the private practice of single or associated persons. A few participants in panel discussions have concluded that some difference in opinion on panels or in publications may have resulted from different backgrounds of clinical experience. Largely for these reasons we have compared two series of patients from our widely separated practices, beginning the study from curiosity and interest and only later considering public presentation of the results.
Contrasts between the clinical material of the two practices are based principally upon the geographic influence of situation in the northernmost and southernmost areas of the United States—Minnesota and Texas. In these regions there is great difference in temperature and the total hours of clear sunlight, leading to the
LYNCH FW, LEHMANN CF, PIPKIN JL. A Contrast of Cutaneous Cancer as Observed in Texas and in Minnesota. AMA Arch Derm. 1959;79(3):275–283. doi:https://doi.org/10.1001/archderm.1959.01560150017003
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