Looking beneath the skin: what’s your diagnosis?

A clinical case of a man presenting with multiple plaques on the face, buccal mucosa and nails. What tests would you run? What do you think the diagnosis is?
A clinical case of a man presenting with multiple plaques on the face, buccal mucosa and nails. What tests would you run? What do you think the diagnosis is?

Dr Silvia Aguilar-Duran
Consultant Dermatologist, Brighton