Main menu
Common skin conditions
NEWS
Join DermNet PRO
Read more
Quick links
For each of the ten cases, study the image and then answer the questions. You can click on the image to view a larger version if required.
Each case should take approximately five minutes to complete. There is a list of suggested further reading material at the end of the quiz.
When you finish the quiz, you can download a certificate.
What is the likely diagnosis?
Chondrodermatitis nodularis helicis chronicum et dolorum (CNH)
What is the differential diagnosis?
Basal cell carcinoma, squamous cell carcinoma, gouty tophus, chilblain, perichondritis, polychondritis, elastotic nodules
What is the treatment?
The treatment of choice is excision. Pressure on the affected area must be avoided long term. The patient should sleep on the unaffected side, or use a pillow with a hole cut in it for the ear. Recurrence of CNH is common following minor trauma eg: sleeping on the ear. Intralesional steroid injection may help early lesions.