It started with a mild sunburn.

Liliya Leheta, a Mississauga-based mom of three, was out with her kids on a sunny day in March of 2023 when she realized she forgot to apply sunscreen. The next day, she noticed her skin peeling on her sternum, but thought little of it — until, less than a year later, she noticed a strange, red mole that suddenly appeared near the centre of her chest.