Case of the Month: January 2025
Clinical history
A 70-year-old white man presents to his primary care physician with concerns about a dark pigmented lesion on his upper right arm. He reports that he has always had many freckles, including this one, but believes it may have changed in shape and size over the past few months. He denies any pain, itchiness, or dryness associated with the lesion. He also denies other systemic symptoms such as fever, rash, and shortness of breath.
Questions:
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What is the most likely diagnosis?
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What are the characteristic clinical features on physical examination?
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What are the next steps in managing this patient?
How to participate
Take a look at the images.
Anyone is welcome to try to solve the puzzle by commenting on the related post on our Instagram.
If you are a medical student at the University of Toronto, you can also:
If you do, you are in for a chance to win a $100 gift card! (UofT Med students only).
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If you are a current medical student at U of T, you can register to join the January case of the month lecture online or in person and have a chance to win a $100 gift card!
You can also join the Special Interest Group in Laboratory Medicine to learn more about Laboratory Medicine.
Laboratory Medicine and the study of disease for medical students
