epidermal inclusion cyst

Epidermal Inclusion Cyst

Epidemiology

 

Most frequent tumour around distal phalanx

 

M>F 2:1

 

Mean age 3rd decade

 

Aetiology

 

Likely traumatic 

- subcutaneous implantation of keratinising epithelium that continues to grow and produce keratin

 

Clinical

 

Painless firm swellings

Most common volar aspect P3 index / middle