We describe three cases of hair loss in a femalepatternhair loss (FPHL) distribution with histologic features oflichenplanopilaris (LPP). All patients had a history of diffuse, gradual hair loss in aChristmastreepatternthat clinically presented as FPHL on gross and dermoscopic examination. Thesepatternscan be categorized into four major groups (Langer lines, dermatomes, Blaschko lines and exogenouspatterns) as well as additionalpatternsthat are associated with one of the major groups (e.g.,'Christmastreepattern', stretch-markpattern).
The disseminated, round- to oval-shaped skin lesions of pityriasis rosea and some other distinctive skin diseases following the Langer lines will arrange in aChristmastreepatternon the upper part of the back. Other skin diseases pathogenically involving a neuronal component may also follow thispattern. grey scales at periphery • wrinkled atrophic appearance 'Cigarette paper scarring' Christmastreepattern • pruritus Resolves in 3 - 6 weeks Three instructive patients diagnosed with Wegener's granulomatosis, cutaneous graft‐versus‐host disease andlichenplanus, whose skin manifestations were following or sparing a zosteriform distributionpatternare reported.
Lichenplanusis a skin condition described clinically by the 6 Ps (purple, pruritic, planar [flat], polygonal papules and plaques) and histologically as prototypic lichenoid interface dermatitis papular lesions (eg, linearlichenplanus), scales (eg,lichenstriatus), dyskeratosis (eg, linear Darier disease), and vascular components (eg, nevoid telangiectasias) of skin disease. 5-9 As a rule, all skin diseases following Blaschko lines involve mosaicism of cutaneous structures in their pathogenesis. Here we review clinical aspects of pityriasis rosea, mycosis fungoides, stage 2 syphilis, exanthematic Kaposi sarcoma, exanthematic psoriasis, Leser-Trelat syndrome, and other primary skin diseases with aChristmastreepattern.
Pityriasis rosea is a self-limiting rash, which resolves in about 6-10 weeks. It is characterised by an initial large herald patch followed by smaller patches resembling achristmastree. Abstract Pityriasis rosea (PR) is a prevalent dermatological condition characterized by a distinctive herald patch, followed by secondary eruptions, often forming a Christmastree"patternon the trunk.
Despite its recognizable clinical presentation, the etiology of PR remains uncertain, with hypotheses pointing to both infectious and noninfectious origins. Human herpesviruses (HHV) 6 and ...
