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

Actinic keratosis

2/2
Actinic keratosisActinic keratosis

Allergic contact dermatitis

2/2
Allergic contact dermatitisAllergic contact dermatitis

Arthropod bite or sting

2/2
Arthropod bite or stingArthropod bite or sting

Cellulitis

2/2
CellulitisCellulitis

Dyshidrotic dermatitis

2/2
Dyshidrotic dermatitisDyshidrotic dermatitis

Flat wart

2/2
Flat wartFlat wart

Gout

2/2
GoutGout

Herpetic whitlow

2/2
Herpetic whitlowHerpetic whitlow

Irritant contact dermatitis

2/2
Irritant contact dermatitisIrritant contact dermatitis

Lichen simplex chronicus

2/2
Lichen simplex chronicusLichen simplex chronicus

Psoriasis

2/2
PsoriasisPsoriasis

Vitiligo

2/2
VitiligoVitiligo

Lichen planus

2/2
Lichen planusLichen planus

Myxoid cyst

2/2
Myxoid cystMyxoid cyst

Skin abscess

2/2
Skin abscessSkin abscess

Acrodermatitis continua of Hallopeau

2/2
Acrodermatitis continua of Hallopeau

Mycobacterium marinum infection

2/2
Mycobacterium marinum infectionMycobacterium marinum infection

Sporotrichosis

2/2
SporotrichosisSporotrichosis

Hand, foot, and mouth disease

2/2
Hand, foot, and mouth diseaseHand, foot, and mouth disease

Keratosis lichenoides chronica

2/2
Keratosis lichenoides chronica

Atypical nevus

1/2
Atypical nevusAtypical nevus

Bacterial paronychia

1/2
Bacterial paronychiaBacterial paronychia

Callus

1/2
CallusCallus

Common wart

1/2
Common wartCommon wart

Cutaneous squamous cell carcinoma

1/2
Cutaneous squamous cell carcinomaCutaneous squamous cell carcinoma

Dermatofibroma

1/2
DermatofibromaDermatofibroma

Foreign body granuloma

1/2
Foreign body granulomaForeign body granuloma

Keloid

1/2
KeloidKeloid

Lobular capillary hemangioma

1/2
Lobular capillary hemangiomaLobular capillary hemangioma

Melanoma

1/2
MelanomaMelanoma

Squamous cell carcinoma in situ

1/2
Squamous cell carcinoma in situSquamous cell carcinoma in situ

Temporomandibular joint syndrome

1/2
Temporomandibular joint syndrome

Tenosynovitis

1/2
TenosynovitisTenosynovitis

Acral lentiginous melanoma

1/2
Acral lentiginous melanomaAcral lentiginous melanoma

Chronic paronychia

1/2
Chronic paronychiaChronic paronychia

Erythronychia

1/2
Erythronychia

Felon

1/2
FelonFelon

Ganglion cyst

1/2
Ganglion cystGanglion cyst

Median nail dystrophy

1/2
Median nail dystrophyMedian nail dystrophy

Onychotillomania

1/2
OnychotillomaniaOnychotillomania

Subungual melanoma

1/2
Subungual melanoma

Giant cell tumor of tendon sheath

1/2
Giant cell tumor of tendon sheathGiant cell tumor of tendon sheath

Nodular hidradenoma

1/2
Nodular hidradenomaNodular hidradenoma

Onychopapilloma

1/2
Onychopapilloma

Superficial acral fibromyxoma

1/2
Superficial acral fibromyxoma

Hereditary brachyonychia

1/2
Hereditary brachyonychiaHereditary brachyonychia

Epithelioid sarcoma

1/2
Epithelioid sarcomaEpithelioid sarcoma