Table 1.

Differential diagnosis of cutaneous sporotrichosis.

Infectious causes
Fungal • Histoplasmosis • Cryptococcus • Blastomycosis • Coccidioidomycosis
Bacterial • Cutaneous anthrax (Bacillus anthracis) • Pyodermatitis (Staphylococcus, Streptococcus) • Cutaneous tuberculosis • Cat-scratch disease (Bartonella henselae) • Syphilis (Treponema pallidum) • Tularemia (Francisella tularensis) • Non-tuberculous mycobacteria (Mycobacterium avium complex (MAC), M. marinum M. chelonae, and M. ulcerans) • Cutaneous nocardiosis (Nocardia brasiliensis) • Tertiary syphilis (Treponema pallidum)
Parasitic • Leishmaniasis (Leishmania braziliensis) • Cutaneous amebiasis (Entamoeba histolytica)
Non-infectious causes
• Pyoderma gangrenosum • Osteomyelitis • Cutaneous sarcoidosis • Sweet’s syndrome • Wegener’s granulomatosis