Dermatology - Epidermal Inclusion Cyst

Dermatology - Epidermal Inclusion  Cyst 
Traumatic epidermis implantation into the dermis results in an epidermal inclusion cyst. The dermis is where traumatized grafted epidermis grows, and the cyst cavity contains keratin buildup that is surrounded by a stratified squamous epithelium with a well-formed granular layer.
The lesion typically affects the palms, soles, and fingers and manifests as a cutaneous nodule.The more superficial nature of pidermal inclusion cysts (found in the dermis rather than the subcutaneous fat) and their overlaying punctum set them apart from lipomas. Although they may appear similar on the surface to epidermal inclusion cysts, many different benign and malignant tumors do not have the punctutum.

If there are no symptoms, treatment is not necessary. Incision and drainage or intralesional triamcinolone acetomide (5–10 mg/mL) are two possible treatments for inflamed lesions. Surgical removal of big or symptomatic cysts is therapeutic.