๐ ็ธฝ็ฎ้ ๏ฝ ๐ ่ฑๆๅๆ๏ผๆฌ็ฏ๏ผ ๏ฝ ๐ ๅฎๆด็ฟป่ญฏ ๏ฝ โญ ็ฒพ่ฏ็ญ่จ
EPIDERMAL INCLUSION CYST
EPIDERMAL INCLUSION CYSTย ย ICD-10: L72.810
โข An epidermal inclusion cyst occurs secondary to traumatic implantation of epidermis into the dermis. Traumatically grafted epidermis grows in the dermis, with accumulation of keratin within the cyst cavity, enclosed in a stratified squamous epithelium with a well-formed granular layer.
โข The lesion appears as a dermal nodule (Fig. 9-33) and most commonly occurs on the palms, soles, and fingers.
โข It should be excised.
โข Synonym: Traumatic epidermoid cyst.
FIGURE 9-32 โข Trichilemmal cystโA firm, dome-shaped nodule on the scalp. Pressure by the cyst has caused atrophy of hair bulbs, and it thus appears without hairs.
FIGURE 9-33 โข Epidermal inclusion cystโA small dermal nodule on the knee at the site of the laceration.