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Erythema Induratum Due to Atypical Mycobacteria. Presented by Dr. Malcolm C. Spencer.
This 51-year-old white woman was referred by her family physician on April 9, 1964, for evaluation of asymptomatic, indurated, erythematous, superficial ulcerations of both calves of three months' duration. The area on the left leg had recently been excised for biopsy.The medical work-up prior to referral included the following: Mantoux first strength negative, second strength weakly positive; histoplasmin complement fixation test negative; routine chest x-ray normal, gastric washings negative for acid fast bacilli; urine smear revealed a few acid fast bacilli; intravenous pyelogram negative; urine culture showed probable scotochromogen; complete blood culture, within normal limits.Dermatologic examination shows a recent operative wound on left calf at biopsy site, and a superficially indurated plaque on right calf with early ulceration.
Biopsy, left calf: Sections of the skin show them to be covered with squamous epithelium with
CHICAGO DERMATOLOGICAL SOCIETY. Arch Dermatol. 1964;90(4):445–448. doi:10.1001/archderm.1964.01600040073018
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