Case of the Month: March 2023

Clinical history

A 67-year-old patient presented to their family doctor for worsening chronic cough with new onset low volume hemoptysis, fatigue, and weight loss. The patient has a 50-pack-year smoking history. The family doctor orders a chest X-ray, which shows a lobular mass-like opacity in the hilum. The patient was referred to the emergency room for urgent diagnostic work-up. CT scan of the chest showed a large hilar mass with lymphadenopathy. A CT-guided core needle biopsy of the mass was obtained.

How to participate

Take a look at these images from an H&E section of the hilar mass biopsy.

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).


Stay tuned for the April Case of the Month, which will be posted mid-April! 

If you are a current medical student at U of T, you can register to join the March case of the month lecture online or in person and have a chance to win a $100 gift card!

If you’re a medical student at the University of Toronto interested in Laboratory Medicine join the Special Interest Group in Laboratory Medicine to be invited to a case of the month lecture (catered).

Laboratory Medicine and the study of disease for medical students

Medical students in the gross lab