Regional Differential Diagnosis of Common Dermatoses

Scalp:

1. Diseases of hair
2. Infected eczema
3. Pediculosis
4. Pityriasis capitis
5. Psorisis
6. Seborrheic dermatitis
7. Tinea capitis

Face:

1. Acne vulgaris
2. Atopic dermatitis
3. Cholasma
4. Contact dermatitis and eczema
5. Dermal leishmaniasis
6. Herpes simplex and zoster
7. Impetigo
8. Lupus erythematosis
9. Lupus vulgaris
10. Rosacea
11. Seborrheic dermatitis
12. Sycosis
13. Vitiligo

Nose:

1. Cholasma
2. Dermal leishmanisais
3. Lupus erythematosis
4. Lupus Vulgaris
5. Rhinoscleroma
6. Rosacea

Ear:

1. Infected eczema
2. Leprosy
3. Seborrheic dermatitis

Neck:

1. Atopic eczema
2. Contact dermatitis
3. Lichen simplex chronicus
4. Skin tags
5. Warts

Back:

1. Contact dermatitis
2. Neurodermatitis
3. Sycosis nuchae

Front:

1. Actinomycosis
2. Contact dermatitis
3. Pityriasis versicolor
4. Pyiderma
5. Scrofuloderma

Lips:

1. Angular stomatitis
2. Cheilitis
3. Cheilitis glandularis
4. Contact dermatitis
5. Deficiency disease
6. Lichen planus
7. Syphilis

Mouth:

1. Dificiency diseases
2. Epithelioma
3. Lichen planus
4. Pemphigus
5. Stomatitis
6. Syphilis
7. Tuberculosis

Chest:

1. Acne
2. Dermatitis
3. Herpes zoster
4. Pediculosis
5. Pityriasis rosacea
6. Pityriasis versicolor
7. Seborrheic dermatitis

Back:

1. Acne Vulagaris (upper side)
2. Dermatitis herpetiformis (Scaplular region)
3. Herpes zoster
4. Pemphigus
5. Pityriasis versicolor
6. Psoriasis
7. Seborrheic dermatitis (interscapular region)

Armpits:

1. Contact dermatitis
2. Flexural psoriasis
3. Fox-Fordyce’s disease
4. Hiradenitis suppurativa
5. Infective eczema
6. Seborrheic dermatitis
7. Tinea
8. Trichomycosis dermatitis
9. Tinea
10. Trichomycosis axillaries

Abdomen:

1. Herpes zoster
2. Lichen planus
3. Pediculosis pubis
4. Pemphigus
5. Pityriasis rosacea
6. Pityriasis versicolor
7. Tinea

Groins:

1. Chancroidal pulp
2. Flexural psoriasis
3. Infective eczema
4. Lymhogranuloma inguinale
5. Moniliasis
6. Scrofuloderma
7. Tinea cruris

Anal region:

1. Condylomata acuminatum
2. Condylomata lata
3. Contact eczema
4. Fissure in ano
5. Neurodermatitis
6. Pruritus ani

Genitals:

1. Chancre
2. Chancroid
3. Contact dermatitis
4. Epithelioma
5. Granuloma inguinale
6. Herpes Progenitalis
7. Leukoplakia
8. Lichen Planus
9. Lichen Sclerosis et atrophicus
10. Neurodermatitis
11. Pediculosis
12. Phagedaena
13. Scabies
14. Secondary syphilis

Arms:

1. Herpes zoster
2. Tinea versicolor

Forearms:

1. Dermatitis herpetiformis
2. Discoid dermatitis
3. Erythema Multiforme
4. Lichen planus
5. Psoriasis
6. Tinea circinata

Elbow:

1. Etopic dermatitis(front)
2. Dermal leishmaniasis
3. Lupus vulgaris
4. Psoriasis (Back)

Hands:

1. Chilblains
2. Contact eczema
3. Drug allergy
4. Dyshidrosis (Palms)
5. Infective dermatitis
6. Keratoderma
7. Leprosy
8. Nummular eczema
9. Psoriasis
10. Pustular bacteroids
11. Raynaud’s disease
12. Syphilis
13. Tinea
14. Trade eruptions
15. Tuberculosis
16. Verrucosis
17. Warts

Thighs:

1. Contact dermatitis
2. Folliculitis
3. Tinea

Knees:

1. Atopic dermatitis
2. Discoid dermatitis
3. Erythema nodosum
4. Folliculitis
5. Henoch Schonlein purpura
6. Lichen planus
7. Neurodermatitis
8. Psoriasis

Feet:

1. Actinomycosis Madurae
2. Bacteroids
3. Buerger’s disease
4. Chilblains
5. Contact dermatitis
6. Discoid dermatitis
7. Dyshidrosis
8. Keratoderma
9. Leprosy
10. Neurodermatitis
11. Post traumatic infective eczema
12. Rynaud’s disease
13. Tinea
14. Tuberculosis cutis verrucosus
15. Varicose ulcers
16. Warts