<unk> s commonly result from implantation of epidermis into the dermis, as in trauma or surgery. They can also be caused by a blocked pore adjacent to a body piercing. They are also seen in Gardner's syndrome and Nevoid basal-cell carcinoma syndrome on the head and neck. They can be infected by bacteria and form a pimple-like shape.
Epidermoid cyst
Palisaded encapsulated neuroma
Dermoid cyst
Ganglion cyst  Ganglion cyst  1
Hidradenoma
Nabothian cyst
Tornwaldt cyst
Sebaceous cyst