Diagnostic dilemma quiz: Can you guess the diagnosis in these strange medical cases?

Every week, Live Science highlights an interesting medical case report in its Diagnostic dilemma series. We describe the patient and their symptoms, tests, and history that revealed their diagnosis, treatment, and ultimate health outcomes. We also highlight what makes the case unique, whether it is the rarity of the diagnosis, the unusual constellation of symptoms, or a novel therapeutic approach.

How many diagnostic dilemmas have you read – and can you guess the diagnosis? Take our quiz based on the cases we’ve highlighted in 2025 and see if you can understand each patient’s illness. Let us know how you got on in the comments below.