Case 4: Painless post auricular swelling
This man presented with a mass.
1. What is the differential diagnosis?.
Includes:sebaceous cyst
lymphadenopathy
lipoma
inclusion dermoid
dermoid cyst
simple cyst
The differential is large. However it can be narrowed by considering the lumps physical characteristics. It is smooth, does not involve skin, there is no punctum, and if felt it is soft, fluctuant and importantly is quite transilluminable.