erythema induratum

the clinical and histological feature of 52 years old woman with erythema induratum are discribed the characteristic cutaneous lesions on the legs of middle-aged woman were violaceous, indurated nodules, 1 to 2 cm in diameter which were painful, occasionally ulcerated and could heal with scarring. the diagnosis was confirmed by a strongly positive tuberculin test, histologic feature and by clearing of lesions after antituberculosis therapy. the histologic feature was infiltration of dermis and subcutaneous by inflammatory cells with epithelioid cells and multinucleated giant langhans cell.