Differential Diagnosis
DDx Strength: Weak
Extensor distribution, Multiple skin lesions Add or remove findings

Prurigo nodularis

Prurigo nodularisPrurigo nodularis

Keratosis pilaris

Keratosis pilarisKeratosis pilaris

Psoriasis

PsoriasisPsoriasis

Dermatitis herpetiformis

Dermatitis herpetiformisDermatitis herpetiformis

Chronic actinic dermatitis

Chronic actinic dermatitisChronic actinic dermatitis

Progressive symmetric erythrokeratoderma

Progressive symmetric erythrokeratoderma

Neurotic excoriations

Neurotic excoriationsNeurotic excoriations

Allergic contact dermatitis

Allergic contact dermatitisAllergic contact dermatitis

Nummular dermatitis

Nummular dermatitisNummular dermatitis

Papular urticaria

Papular urticariaPapular urticaria

Subacute cutaneous lupus erythematosus

Subacute cutaneous lupus erythematosusSubacute cutaneous lupus erythematosus

Drug-induced pigmentation

Drug-induced pigmentationDrug-induced pigmentation

Rheumatoid nodule

Rheumatoid noduleRheumatoid nodule

X-linked ichthyosis

X-linked ichthyosisX-linked ichthyosis

Anti-TNF-alpha-induced eruptions

Anti-TNF-alpha-induced eruptions

Arcanobacterium haemolyticum pharyngitis

Arcanobacterium haemolyticum pharyngitis

Epidermolysis bullosa acquisita

Epidermolysis bullosa acquisitaEpidermolysis bullosa acquisita

Lichen amyloidosis

Lichen amyloidosisLichen amyloidosis

Xanthoma tendinosum

Xanthoma tendinosumXanthoma tendinosum

Coumadin necrosis

Coumadin necrosisCoumadin necrosis

Eruptive xanthoma

Eruptive xanthomaEruptive xanthoma

Familial leiomyomatosis cutis et uteri

Familial leiomyomatosis cutis et uteriFamilial leiomyomatosis cutis et uteri

Kyrle disease

Kyrle diseaseKyrle disease

Linear IgA bullous dermatosis

Linear IgA bullous dermatosisLinear IgA bullous dermatosis

Noonan syndrome

Noonan syndromeNoonan syndrome

Papular mucinosis

Papular mucinosisPapular mucinosis

Tumid lupus erythematosus

Tumid lupus erythematosusTumid lupus erythematosus

Erythema elevatum diutinum

Erythema elevatum diutinumErythema elevatum diutinum

Immunoglobulin A vasculitis

Immunoglobulin A vasculitisImmunoglobulin A vasculitis

Vitamin A deficiency

Vitamin A deficiencyVitamin A deficiency

Amicrobial pustulosis of the folds

Amicrobial pustulosis of the folds

Bier spots

Bier spots

Cutaneous tuberculosis

Cutaneous tuberculosisCutaneous tuberculosis

Dyskeratosis congenita

Dyskeratosis congenitaDyskeratosis congenita

Granulomatosis with polyangiitis

Granulomatosis with polyangiitisGranulomatosis with polyangiitis

Papillon-Lefevre syndrome

Papillon-Lefevre syndrome

Type 2 lepra reaction

Type 2 lepra reaction

Familial white lentiginosis

Familial white lentiginosis

Keratoderma of Vohwinkel

Keratoderma of Vohwinkel

Mal de Meleda keratoderma

Mal de Meleda keratoderma

Olmsted syndrome

Olmsted syndrome

Keratoacanthoma

KeratoacanthomaKeratoacanthoma

Lyme disease

Lyme diseaseLyme disease

Macular amyloidosis

Macular amyloidosisMacular amyloidosis