Differential Diagnosis > Morphology > Reaction Patterns Expanded > Verrucous

Verrucous

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Verrucous and "hyperkeratotic" are often synonymous for purpose of description or eliciting a differential diagnosis.

 

Single Verrucous Lesion:

•HPV
•SCC
•verrucous carcinoma
•LSC/prurigo
•deep fungal (chromo)/atypical mycobacteria
•Seborrheic Keratosis

 

Other Verrucous:

•Epidermolytic hyperkeratosis
•acrokeratosis verucciformis
•acquired digital fibrokeratoma

 

hmtoggle_plus1Linear Verrucous ddx:
•epidermal nevus ( ILVEN, nevus sebaceous)
•IP (stage 2)
•Perforating Disease (EPS)

 

hmtoggle_plus1Suppurative and verrucous ddx: (aka vegetative ulcer)
•pyoderma gangrenosum
•halogenoderma
•deep fungal (vs. atypical mycobacteria)

 

hmtoggle_plus1Verrucous plaque on hand ddx:

think "innoculation":

•prosector's wart
•atypical mycobacteria (vs. deep fungal)
•leishmania

 

 

hmtoggle_plus1Purple and Verrucous Plaques on Legs:
•KS
•pseudo-KS
•hypertrophic LP
•lichenoid BPP
•LSC
•expanded ddx: Keratosis Lichenoides Chronica (rare), lichen amyloid (distinct), angikeratoma of Mibelli (rare)