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[A contribution to the classification of seborrheic keratoses (author's transl)].

A clinico-statistical study is reported, basing on a material of 639 excised tumours which were defined histologically as seborrheic keratoses. All statements concerning clinical diagnoses and differential diagnoses, localization, development, age and sex of patients were transferred to punch cards. By means of a suitable EDA program, basic counts and a multidimensional analysis of conditioned frequencies [14] were performed. The results indicate, that the different clinical forms of seborrheic warts, often discriminated in the literature, are variants of the same entity.