Primary tuberculous chancre caused by Mycobacterium bovis after goring with a bull's horn.

A 14-year-old boy was gored by a bull during festival celebrations. The horn of the bull caused a wound on his left hand and after 3 months it was a accompanied by an ulcerated nodule on the left upper arm and an axillary adenopathy. The tuberculin test was positive and a culture of the aspiration biopsy specimen of the axillary lymph node yielded Mycombacterium bovis.