Last updated on: February 23rd, 2022

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You’re looking at an interactive case study from Prognosis: Your Diagnosis (one of four distinct learning formats available in Clinical Odyssey). Try it out, and have fun improving your clinical skills.



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A 48 year old cattle farmer presents with multiple painless black lesions on his right arm.

Two weeks ago he had accidentally grazed his right arm on a farm tool.

A few days later, pruritic papules appeared at that sites. These subsequently progressed into larger lesions surrounded by edema, over the following weeks.

His medical, surgical and drug histories are unremarkable. He does not smoke or consume alcohol, and denies abuse of prescription drugs.

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