Atopic dermatitis differential diagnosis

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief:

Differentiating Atopic Dermatitis from other Diseases

Category	Diseases	Etiology	Inherited	Acquired	Clinical manifestations													Para-clinical findings									Gold standard	Additional findings
					Demography	History	Symptoms						Physical examination
																		Lab Findings							Imaging	Histopathology
							Appearance				Itching	Bleeding	Fever	BP	Tenderness	Nail pitting	Other	CBC			ESR/CRP	Electrolytes	BUN/Cr	LFT
							Single/ Multiple	Rash	Involved areas	Pustule								WBC	Hb	Plt
Skin disorders	Atopic dermatitis
	Allergic contact dermatitis	Delayed-type hypersensitivity response Skin inflammation mediated by hapten-specific T cells					May be multiple	Erythematous well-demarcated papules	Any area in contact with the offending agent	–	+	–	–	Nl	–	–	Stinging and burning	Nl	Nl	Nl	Nl	Nl	Nl	Nl	NA		Diagnosis of exclusion	Negative hypersensitivity tests
	Irritant contact dermatitis	Activation of the innate immune system by the pro-inflammatory properties of chemicals				Cumulative exposure to irritants			Any area in contact with the irritant
	Seborrheic dermatitis				Any, onset during the 1st days or weeks of life			Greasy scaling on a yellow-red base	Scalp, axilla, and diaper area		–
	Psoriasis
	Lichen simplex chronicus
	Ichthyosis vulgaris
	Nummular dermatitis
	Netherton's syndrome
	Dubowitz syndrome
	Erythrokeratodermia variabilis
Infection	Dermatophytes
	Candida
	Herpes simplex
	Staphylococcus aureus
	Molluscum contagiosum
	Scabies					Positive family history	Multiple	Erythematous papular lesions	Flexor wrists, finger webs and genitalia		+++
	HIV
	Diseases	Etiology	Inherited	Acquired	Demography	History	Single/ Multiple	Rash	Involved areas	Pustule	Itching	Bleeding	Fever	BP	Tenderness	Nail pitting	Other	WBC	Hb	Plt	ESR/CRP	Electrolytes	BUN/Cr	LFT	Imaging	Histopathology	Gold standard	Additional findings
Immunologic disorders	Dermatitis herpetiformis
	Pemphigus foliaceus
	Graft-versus-host disease
	Dermatomyositis
Immune deficiency	Wiskott-Aldrich syndrome
	Hyper-IgE syndrome
	DiGeorge syndrome
	Severe combined immunodeficiency (SCID)
	Ataxia telangiectasia
	Diseases	Etiology	Inherited	Acquired	Demography	History	Single/ Multiple	Rash	Involved areas	Pustule	Itching	Bleeding	Fever	BP	Tenderness	Nail pitting	Other	WBC	Hb	Plt	ESR/CRP	Electrolytes	BUN/Cr	LFT	Imaging	Histopathology	Gold standard	Additional findings
Metabolic Diseases	Phenylketonuria
	Tyrosinemia
	Histidinemia
	Multiple carboxylase deficiency
Nutritional deficiencies	Zinc deficiency
	Niacin (B3) deficiency
	Pyridoxine (B6) deficiency
	Biotin (B7) deficiency
Malignancy	Mycosis fungoides
	Histiocytosis X
Medications	Infliximab
Category	Diseases	Etiology	Inherited	Acquired	Demography	History	Single/ Multiple	Rash	Involved areas	Pustule	Itching	Bleeding	Fever	BP	Tenderness	Nail pitting	Other	WBC	Hb	Plt	ESR/CRP	Electrolytes	BUN/Cr	LFT	Imaging	Histopathology	Gold standard	Additional findings

References

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