A rare type of panniculitis affecting primarily adolescents and menopausal females.
A bilateral nodular panniculitis.
Lesions are generally less red and tender compared to those of erythema nodosum.
Felt to be a vasculitis affecting deep blood vessels of the sub cutis, with subsequent necrosis and inflammation of the associated fat tissues.
Presents as a tender erythematosus nodule that eventually ulcerates.
Most commonly unassociated with an underlying disease.
With suspicion of erythema induratum patients should have skin test for PPD.
50-70% of cases are related to Mycobacterium tuberculosis.