A 47-year-old diabetic patient with profound peripheral neuropathy developed a blister on the plantar aspect of her right heel that became recalcitrant to conservative treatment. These ulcers have punched-out edge and slough in floor, resembling gummatous ulcer. Surrounding area might have loss of sensation.
Malum perforans
Lichen spinulosus
Lichen aureus
Lichen ruber moniliformis
Herpes gladiatorum
Ichthyosis hystrix
Tinea incognita
Lawsonia inermis