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To the Editor.—My recent note on the nomenclature of cellular nevi was intentionally brief; so brief, I fear, that it seemed to imply a lack of respect for Dr. Traub's important contribution to our understanding of these lesions. I vividly recall the first case of growing nevi (intraepidermal, junction, or compound, depending on the plane of the section) I ever encountered, while I was in training, in 1938. It was regarded as so remarkable and puzzling as to be worth reporting, and was reported (Arnold, H. L., Jr.: Multiple Pigmented Nevi: Report of a Case, Arch. Dermat. & Syph. 40:386-389 [Sept.] 1939). Today this case would be regarded—thanks to Dr. Traub's publications on the classification of these lesions—as utterly commonplace.
A morphologic classification is a valuable advance, in that it defines terms and permits communication of ideas. If a biologic classification can develop out of it, however