Linear Dermatoses: A Prospective study

Prabahar, P (2007) Linear Dermatoses: A Prospective study. Masters thesis, Madras Medical College, Chennai.


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INTRODUCTION : Skin is a very important and largest organ of the body. It is the only organ which is visible and is in direct contact with the environment. In the examination of the skin, the morphology of individual lesions, their overall pattern and spatial relationship to each other, and their body site distribution are helpful and provide an easily recognizable clue to a rapid visual diagnosis. Indeed, clinical diagnosis is more precise than laboratory tests in many disorders. Skin lesions present with innumerable patterns like Discoid, Petaloid, Arcuate, Annular, Polycyclic, Livedo, Reticulate, Target, Stellate, Digitate, Linear, Serpiginous, Whorled, etc. Among these patterns, Linearity is a stellar pattern which attracts the attention of patients and clinicians alike. A single lesion may assume a linear shape or a number of lesions may be arranged in a linear pattern. The mechanisms or anatomical factors dictating the Linearity are of the following groups: - Linear configurations determined by the course of blood vessels, lymphatics or nerve trunks - Linear lesions of developmental origin - Linear lesions following Dermatomal pattern - Linear lesions caused by External factors like Plants, Allergens, Chemicals, Thermal and Physical factors (includes Koebner’s phenomenon). - Linear configurations due to other determinants Most of the Linear lesions follow the Blaschko’s lines. Patients with linear lesions attending the Dermatology Out Patient Department at Govt. General Hospital comprise my study group. AIMS OF STUDY : 1. To study the Incidence of Linear Dermatoses at the Skin Out Patient Department, Government General Hospital, Madras Medical College, Chennai, during the period Sep-2004 to Sep-2006 2. To study the age and sex distribution. 3. To study the symptomatology and predisposing factors. 4. To study the various sites of distribution. 5. To study the histopathological pattern. 6. To look for other associated conditions. CONCLUSION : 1. The Incidence of Linear Dermatoses in our skin Out Patient Department, Govt. General Hospital, Madras Medical College, Chennai during the period of Sep- 2004 to Sep-2006 --- 0.32 % 2. Among the Linear Dermatoses, Lichen striatus was found to be more common 3. The other Dermatoses following Blaschko’s lines, in the descending order of frequency seen in this study were Linear Lichen Planus, Linear Verrucous Epidermal Nevus, Linear Morphoea, Linear Vitiligo, Linear Psoriasis and Linear Lichenoid Dermatitis. 4. In this study, on the whole, slight Male preponderance was noted. 5. Majority of patients showed unilateral distribution in a linear pattern, more often on the extremities. 6. The importance of histopathological correlation is very obvious. Cases which were clinically diagnosed as Lichen Striatus showed histopathological features of Psoriasis and Linear Epidermal Verrucous Nevus, ultimately changing the management in any given condition. 7. The lesions were more of a cosmetic concern in most of the cases in this study. 8. Very few associations were noted such as, cases of Lichen Planus which were associated with Becker’s Nevus, Insect bite allergy and HBs Ag sero positivity and Lichen Striatus with Xerosis, Tinea Versicolor and photosensitivity.

Item Type: Thesis (Masters)
Uncontrolled Keywords: Linear Dermatoses ; Prospective study.
Subjects: MEDICAL > Dermatology Venereology and Leprosy
Depositing User: Subramani R
Date Deposited: 05 Jul 2017 01:38
Last Modified: 01 Mar 2018 16:19

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