To group a number of otherwise dissimilar dermatoses under a solitary character such as color and at the same time to discuss them from the standpoint of pathology properly require explanation. Ordinarily, to occupy the sacred precincts of pathology and revolve around a single item, such as color, might well be criticized as being, if not sacrilegious, in bad form, or at least of a low order of appreciation of the premises. The particular color in this case, yellow, is an outstanding and comparatively distinctive one when present in a dermatosis— there is little question in a given lesion whether it is or is not present. Furthermore, it is present in but a limited number of dermatoses, and hence from the standpoint of differential diagnosis confines considerations to but a limited list of dermatoses. That is, the situation is different from that of redness, whiteness or brownness
WEIDMAN FD. THE PATHOLOGY OF THE YELLOWING DERMATOSES: I. NONXANTHOMATOUS (JAUNDICE, CAROTINEMIA, BLOOD PIGMENTATION, MELANIN, COLLOID DEGENERATION AND ELASTIC DEGENERATION). Arch Derm Syphilol. 1931;24(6):954–991. doi:10.1001/archderm.1931.01450010969002
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