Case of the Month: February 2025

Clinical history

A 55-year-old woman with a 20-pack-year smoking history presents with several months of progressive muscle weakness. Chest CT reveals a mediastinal mass, which is later surgically resected.​

Questions:

• What are the potential diagnoses for this case?​

• What are the relevant physical exam findings?​

• How is this tumor classified histologically?​

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:

• Fill out the online form
• Join the related lecture

If you do, you are in for a chance to win a $100 gift card! (UofT Med students only).

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.

Join our mailing list to learn more about LMP programs