VOLUME OF EPIDERMIS AND DERMAL PAPILLAE IN PSORIASIS ACTINIC KERATOSES AND LENTIGO

[摘要] Using a technic modified from that of Van Scott and Ekel, the areas representing volumes of epidermis and dermal papillae were measured for 5 cases of psoriasis, 3 of actinic keratoses and 3 of lentigo, with adjacent uninvolved skin also measured as a control in each instance. It appeared that the change in the epidermal volume paralleled the change in volume of dermal papillae in these 3 different conditions. The parameter suggested by Van Scott and Ekel, that is, the measurement of the area (volume) of the dermal papillae utilizing a line drawn connecting the bases of the rete ridges, might well be a measure of the papillary dermis. From this viewpoint, the papillary dermis and the epidermis act as a unit, and change volume to approximately the same extent, although to different amounts, in psoriasis, actinic keratoses, and lentigo, and probably in many other dermatoses.