Erythema Induratum

Erythema induratum (Bazin disease) is nodular vasculitis/tuberculid on posterior calves (tender violaceous nodules, often ulcerating), associated with Mycobacterium tuberculosis. Treatment: antituberculous therapy (isoniazid/rifampin/pyrazinamide/ethambutol) if TB-associated; rest; compression; wound care for ulcers; evaluate TB screen (PPD/IGRA/CXR/sputum); biopsy/culture; differential (nodular vasculitis/other panniculitis); follow-up dermatology/infectious disease.

Common Symptoms

Tender violaceous calf nodules; ulceration; TB-associated

Causes and Pathogenesis

Tuberculid hypersensitivity causes nodular vasculitis of subcutaneous fat.

Treatment

Anti-TB therapy; rest; wound care; evaluate TB

Preventive Measures

TB screening; treat latent TB.

Department to Visit

It is recommended to visit the Dermatology/Infectious-disease department; an appointment can be booked on this platform before the visit.

Warm reminder: The above information is for health science reference only and cannot replace professional medical diagnosis. If you have related symptoms, please seek medical attention at a regular hospital promptly.