Epidermal cyst
LEGEND
The most common type of cyst
A cyst is a closed cavity surrounded by a wall and filled with material such as keratin or mucin.
The epidermoid cyst has a wall derived from stratified keratinized squamous epithelium.
It contains lamellated keratin, in contrast to the trichilemmal cyst, which contains compact keratin.
Epidermal cyst
LEGEND
The cyst wall is composed of stratified squamous epithelium.
A granular layer is present, distinguishing it from the trichilemmal cyst, which lacks a granular layer.
Contains loosely lamellated keratin.
Epidermal cyst
Lamellated keratin
Stratified squamous epithelium
Presence of a granular layer
