1/3. lichen nitidus of the palms: a case with peculiar histopathologic features.Palmar involvement in lichen nitidus is infrequent. In such cases, the histopathologic findings of palmar lesions are usually identical to those of extrapalmar ones. We report on the case of a patient with multiple tiny papules located on the palms and elbows. A biopsy specimen from the elbow showed the typical features of lichen nitidus, but a biopsy from the palm disclosed an inflammatory infiltrate mostly disposed around the bases of rete ridges and composed of lymphocytes and histiocytes with some giant cells both in the dermis and in the epidermis. This location of the infiltrate is similar to that found in hypertrophic lichen planus, a combination of lichen planus and lichen simplex chronicus. We conclude that this histopathologic feature in palmar lichen nitidus could be the result of the superimposition of lichen nitidus on normal palmar skin, resulting in a picture resembling hypertrophic lichen planus.- - - - - - - - - - ranking = 1keywords = palm (Clic here for more details about this article) |
2/3. lichen nitidus presenting as palmoplantar hyperkeratosis and nail dystrophy.Four patients with lichen nitidus who presented with palmoplantar or nail lesions are reported. In three cases palmoplantar hyperkeratosis was marked; these cases also had nail-plate lesions, but in all four, lesions of lichen nitidus at other sites were absent, sparse or asymptomatic.- - - - - - - - - - ranking = 0.6keywords = palm (Clic here for more details about this article) |
3/3. Purpuric lichen nitidus.We report the case of a patient in whom lichen nitidus with hemorrhage was found on the palm and the thigh. Histopathologically, the small vessels in the lesions showed extensive changes and were increased in number. The capillary walls revealed degenerative changes with extravasation of erythrocytes. On electron microscopy, amorphous, electron-dense deposits were observed along the outside of the endothelial cells. These findings can explain the presence of the hemorrhagic changes. We describe this as a case of purpuric lichen nitidus.- - - - - - - - - - ranking = 0.1keywords = palm (Clic here for more details about this article) |