A nodular or ulcerative skin cancer with a pearly border and telangiectasias, which lacks the rubbery texture and granulomatous inflammation of a gumma.
Can cause ulcerative nodules, but is diagnosed by fungal culture or special stains on a biopsy specimen.
Cutaneous tuberculosis that presents as reddish-brown nodules showing an 'apple-jelly' color on diascopy, and biopsy reveals caseating granulomas.
A friable, bright red vascular papule that bleeds easily, unlike the firm, indurated, and often ulcerative gumma.
A firm, indurated nodule or ulcer, but biopsy will show malignant keratinocytes, not the granulomatous inflammation and endarteritis of a gumma.