Erythema Induratum? Tuberculous Ulcer? Presented by Dr. Francis W. Lynch, St. Paul.
Mrs. R. E. L., aged 60, first presented an inflammatory plaque on the lower portion of the right leg in 1945. It was about 1 in. (2.5 cm.) in diameter and showed central softening. Twenty months previously she had a severe respiratory infection, followed by development of pulmonary tuberculosis, treated by rest in bed for three months. Since that date there has been periodic observation of the chest, but no evidence of reactivation of the tuberculous process has been found.
In October, 1951, an ulcer appeared anteriorly on the right leg at the site of some insect bites. This failed to respond to antibiotic applications, rest, and the use of Panthoderm (a water-miscible cream containing 2% Panthenol [the alcoholic analog of pantothenic acid]). On Nov. 11, 1952, the ulcer measured 17 by 38 mm. in diameter. Treatment with