Christmas Tree Pattern Lesion

Pityriasis rosea is a rash that can appear anywhere on your body, especially your trunk, arms and legs. Antihistamines and hydrocortisone creams can reduce itching. The disseminated, round.

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. Pattern analysis of skin lesions is an art and a key competence of every dermatologist.

Three major line patterns cover the human body-the dermatomes or Head zones, the nevoid lines of Blaschko, and the relaxed skin tension lines, or Langer lines. Head zones represent skin areas innervated from the. Pityriasis rosea is often recognized by a distinctive "herald patch"-a single, round or oval lesion that appears on the chest, back, or neck.

A few days to two weeks later, more smaller lesions appear, creating a characteristic "Christmas tree" pattern along the skin. What Causes Pityriasis Rosea? The "Christmas tree" orientation of scaling lesions along the skin tension (Langer) lines in pityriasis rosea is well known.

This pattern is best appreciated on complete examination of the trunk, in which the eruption follows the long axis of the V-shaped lines of the upper chest and back, emanating around the axillae, and running transversely along the abdominal wall and lower back. The first mention we could find of the Christmas tree pattern was in a 1956 article written by John T. Crissey (1924-2009) while at the University of Buffalo in New York.

2, 3 Crissey later became a professor of dermatology at the University of Southern California, Los Angeles. In the Christmas tree effect, the spine serves as the tree's trunk with the skin lesions outlining its branches as. Christmas tree rash, or pityriasis rosea, is an oval-shaped skin patch that can appear on different parts of your body.

Here's how to identify it and what to do if you have it. 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. Three major line patterns cover the human body.