Koebner Phenomenon in Lichen Nitidus

A Case of Generalized Lichen Nitidus with Koebner's Phenomenon

“…Rarely, there are keratodermic, vesicular and hemorrhagic(5), or petechial and perforating variants(6). Koebner's phenomenon was simultaneously observed in our case as in those reported by Ocampo et al(2) and Pinkus et al(4). In our case, interestingly, the papules of Koebner's phenomenon were flattened and disappeared from the biopsied portion.…”

Generalized Purpuric Lichen Nitidus in a 32-Year-Old Filipino Male with Acute Myeloid Leukemia: Case Report

“…Lichen nitidus is a rare lichenoid tissue reaction first described by Felix Pinkus in 1907 as an asymptomatic and benign localized eruption on the shaft of the penis. 4 The etiology of lichen nitidus remains unknown. It has no known racial or sex predilection, although it can be seen more commonly in children and young adults.…”

Summertime Actinic Lichenoid Eruption

“…Clinically similar lesions of lichen nitidus [6] are usually asymptomatic, discrete, not confined to sun-exposed areas and do not show any seasonal variation. Classical lichen planus papules are larger, polygonal, flat topped and violaceous and its actinic variant is mostly characterized by dyschromie or pigmented plaques with crenated margins [1], Micropapules similar to those seen in SALE or lichen nitidus are, however, sometimes seen as satellites to larger typical lesions of lichen planus or lichen planus actinicus but microscopically these demonstrate a characteristic lichenoid tissue reac tion ( fig.…”