Non-Healing Finger Ulcers in 2 Teen Boys

Antibiotics have not been effective in either case and one of the teens is losing time at work visiting doctors. Can you dx?

Each of the 18-year-olds in this slide show sought help for an ulcerated lesion on a finger. They were examined and evaluated in emergency and primary care settings and were prescribed  antibiotics, without improvement. Where did the previous clinicians get tripped up?Click through the stories above. What are your diagnoses and how did you formulate them?