Christmas Tree Pattern Derma

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. 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 rash that can appear anywhere on your body, especially your trunk, arms and legs. Antihistamines and hydrocortisone creams can reduce itching.

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.

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. 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. These papules and plaques form a "Christmas tree" pattern on the back. In an uncommon type of pityriasis rosea, the rash may be concentrated in the armpits and groin or on the face, forearms, and shins.

In lighter skin colors, the rash can be any shade of pink or red. Surprisingly, none of these references offer any discussion on the origin of the term. Where did the Christmas tree eponym come from? To answer this question, we reviewed numerous textbooks of dermatology and review articles on pityriasis rosea going back over 100 years and found no mention of the Christmas tree eponym before the 1950s.

Other skin diseases may follow a Christmas tree pattern when associated with an isotopic response to a primary skin disease that occurs in a Christmas tree pattern [4]. Here, we describe a case of multiple targetoid lesions following a Christmas tree pattern in a 64.