Differential Diagnosis
DDx Strength: None
Extensor distribution, Multiple skin lesions Add or remove findings

Neurotic excoriations

2/2
Neurotic excoriationsNeurotic excoriations

Prurigo nodularis

2/2
Prurigo nodularisPrurigo nodularis

Allergic contact dermatitis

2/2
Allergic contact dermatitisAllergic contact dermatitis

Keratoacanthoma

2/2
KeratoacanthomaKeratoacanthoma

Keratosis pilaris

2/2
Keratosis pilarisKeratosis pilaris

Nummular dermatitis

2/2
Nummular dermatitisNummular dermatitis

Psoriasis

2/2
PsoriasisPsoriasis

Papular urticaria

2/2
Papular urticariaPapular urticaria

Rheumatoid nodule

2/2
Rheumatoid noduleRheumatoid nodule

Subacute cutaneous lupus erythematosus

2/2
Subacute cutaneous lupus erythematosusSubacute cutaneous lupus erythematosus

Drug-induced pigmentation

2/2
Drug-induced pigmentationDrug-induced pigmentation

Lyme disease

2/2
Lyme diseaseLyme disease

X-linked ichthyosis

2/2
X-linked ichthyosisX-linked ichthyosis

Anti-TNF-alpha-induced eruptions

2/2
Anti-TNF-alpha-induced eruptions

Arcanobacterium haemolyticum pharyngitis

2/2
Arcanobacterium haemolyticum pharyngitis

Dermatitis herpetiformis

2/2
Dermatitis herpetiformisDermatitis herpetiformis

Epidermolysis bullosa acquisita

2/2
Epidermolysis bullosa acquisitaEpidermolysis bullosa acquisita

Lichen amyloidosis

2/2
Lichen amyloidosisLichen amyloidosis

Papular mucinosis

2/2
Papular mucinosisPapular mucinosis

Xanthoma tendinosum

2/2
Xanthoma tendinosumXanthoma tendinosum

Chronic actinic dermatitis

2/2
Chronic actinic dermatitisChronic actinic dermatitis

Coumadin necrosis

2/2
Coumadin necrosisCoumadin necrosis

Eruptive xanthoma

2/2
Eruptive xanthomaEruptive xanthoma

Familial leiomyomatosis cutis et uteri

2/2
Familial leiomyomatosis cutis et uteriFamilial leiomyomatosis cutis et uteri

Kyrle disease

2/2
Kyrle diseaseKyrle disease

Linear IgA dermatosis

2/2
Linear IgA dermatosisLinear IgA dermatosis

Noonan syndrome

2/2
Noonan syndromeNoonan syndrome

Tumid lupus erythematosus

2/2
Tumid lupus erythematosusTumid lupus erythematosus

Erythema elevatum diutinum

2/2
Erythema elevatum diutinumErythema elevatum diutinum

Henoch-Schönlein purpura

2/2
Henoch-Schönlein purpuraHenoch-Schönlein purpura

Vitamin A deficiency

2/2
Vitamin A deficiencyVitamin A deficiency

Amicrobial pustulosis of the folds

2/2
Amicrobial pustulosis of the folds

Bier spots

2/2
Bier spots

Cutaneous tuberculosis

2/2
Cutaneous tuberculosisCutaneous tuberculosis

Dyskeratosis congenita

2/2
Dyskeratosis congenitaDyskeratosis congenita

Granulomatosis with polyangiitis

2/2
Granulomatosis with polyangiitisGranulomatosis with polyangiitis

Papillon-Lefevre syndrome

2/2
Papillon-Lefevre syndrome

Type 2 lepra reaction

2/2
Type 2 lepra reaction

Familial white lentiginosis

2/2
Familial white lentiginosis

Keratoderma of Vohwinkel

2/2
Keratoderma of Vohwinkel

Mal de Meleda keratoderma

2/2
Mal de Meleda keratoderma

Olmsted syndrome

2/2
Olmsted syndrome