This document discusses several papulosquamous disorders including lichen planus, psoriasis, and pityriasis rosea. Lichen planus presents as intensely itchy violaceous papules on the skin and mucous membranes. Psoriasis causes red, scaly patches that can range from small to covering the entire body. It is thought to have a genetic trigger. Pityriasis rosea causes a common rash that usually disappears on its own within 6-8 weeks. The document provides details on the pathology and types of each condition and includes ICD-10 codes for classification.

1. PAPULOSQUAMOUS
DISORDERS

2. INTRODUCTION
• papulosquamous disorder is a condition which presents
with both papules and scales
• Examples include psoriasis, lichen planus and pityriasis
rosea.

3. LICHEN PLANUS (LP)
• Lichen planus (LP) is a rash characterised by intensely
itchy polygonal papules with violaceous hue involving the
skin and less commonly the oral or genital mucosa, hair
and nails and/or the scalp.
• The most frequent oral presentation is asymptomatic
reticular LP, but painful erosive or ulcerative areas may
appear.

4. PATHOLOGY
• Hyperkeratosis
• Prominent granular layer
• Basal cell degeneration forming apoptotic bodies
• Heavy T lymphocyte- sawtooth dermo-epidermal junction.

5. PSORIASIS
• Psoriasis is a long-lasting autoimmune disease which is
characterized by patches of abnormal skin. These skin
patches are typically red, itchy, and scaly. They may vary
in severity from small and localized to complete body
coverage.

6. TYPES OF PSORIASIS
• There are five main types of psoriasis listed as below:-
• plaque
• Guttate
• Inverse
• pustular
• erythrodermic

7. • Plaque psoriasis, also known as psoriasis vulgaris
• Psoriasis is generally thought to be a genetic
disease which is triggered by environmental
factors. In twin studies, identical twins are three times
more likely to both be affected compared to non-identical
twins

8. LICHEN SCLEROSIS
• Uncommon condition.
• It is a chronic disese .
• White lichenified atrophic lesion are seen over the
genitalia.
• Cause unknown but associated with autoimmune
diseases.

9. PITYRIASIS ROSEA
Pityriasis rosea is a common skin disease that causes a
rash. This rash usually disappears on its own without
treatment. You can expect to see the rash for about 6 to 8
weeks. Sometimes the rash lasts much longer

10. ICD-10-CM GUIDELINES
• Psoriasis-40
• paraPsoriasis-41
• Pityriasis rosea-L42
• Lichen planus-L43
• Other papulosquamous disorders-L44
• papulosquamous disorders in diseases classified
elsewhere-L45
• Code first underlying disease.
• https://www.medesunglobal.com

11. THANK
YOU