Christmas Tree Pattern Lichen Planus
The skin diseases typically following a Christmas tree pattern are limited and essentially comprise pityriasis rosea and mycosis fungoides. A number of chronic inflammatory or infectious skin diseases may follow a Christmas tree pattern in selected cases. 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 a christmas tree. These patterns can be categorized into four major groups (Langer lines, dermatomes, Blaschko lines and exogenous patterns) as well as additional patterns that are associated with one of the major groups (e.g., 'Christmas tree pattern', stretch-mark pattern). See Annular Lesion Viral Exanthem Seborrheic Dermatitis Secondary Syphilis Unlike pityriasis, Syphilis affects palms and soles Nummular Eczema Tinea Corporis Typically a single lesion (may be confused with herald patch) Once Christmas Tree pattern of lesions develops, Pityriasis diagnosis becomes more obvious Guttate Psoriasis Lichen Planus.
Christmas tree lichen by OutlandFishArt on DeviantArt
We describe three cases of hair loss in a female pattern hair loss (FPHL) distribution with histologic features of lichen planopilaris (LPP). All patients had a history of diffuse, gradual hair loss in a Christmas tree pattern that clinically presented as FPHL on gross and dermoscopic examination. oval-shaped red patch on her chest a week ago but that more of the lesions are now appearing on her back.
On examination, the lesions on her back are in a "Christmas tree" pattern. What is the girl's most likely diagnosis? A) Lichen planus B) Pityriasis rosea C) Rosacea D) Melasma B. Clinics in Dermatology (2011) 29, 189-194 Skin diseases following a Christmas tree pattern Andreas Wollenberg, MD *, Tatiana Eames, MD Department of Dermatology and Allergy, Ludwig-Maximilian-University, Frauenlobstrasse 9-11, D-80337 Munich, Germany Abstract Pattern analysis of skin lesions is an art and a key competence of every dermatologist.
Other papulosquamous disorders
Three major line patterns cover the human body. We report three instructive patients diagnosed with Wegener's granulomatosis, cutaneous graft-versus-host disease and lichen planus, whose skin manifestations were following or sparing a. The smaller secondary lesions of pityriasis rosea follow Langer's lines (Figure 3).
When the lesions occur on the back, they align in a typical "Christmas tree" or "fir tree" pattern.
