Epidermal inclusion cyst of the sole

Epidermal inclusion cyst embedded in a recurrent benign fibrous histiocytoma

“…[2] In 1884, Schweninger was the first to produce experimentally epidermal inclusion cysts by burying bit of skin in the subcutaneous tissues of dogs. [1] Trauma causing such inclusions could occur from both blunt and sharp objects. The occurrence on sole and foot has been reported as a confirmation of the theory of impingement and implantation of epidermis by minimal and blunt trauma.…”

“…The occurrence on sole and foot has been reported as a confirmation of the theory of impingement and implantation of epidermis by minimal and blunt trauma. [16] Minimal access surgeries are also known to have greater risk of causing epidermal inclusion cysts by virtue of the technique, which uses small incisions and rapidly rotating instruments. [7] So much so that, epidermal inclusion cyst is a known complication of abdominoplasty.…”

“…These cyst may arise from implantation of epidermis in the dermis or subcutaneous tissues. [12] Implantation may occur during development as in the extremely rare midline cysts of the scalp, that are present at birth. [23] However, the implantation can occur due to trauma and as a result of surgery.…”

“…[23] However, the implantation can occur due to trauma and as a result of surgery. [1] I present a case of recurrence of benign fibrous histiocytoma following incomplete excision with implantation of an epidermal inclusion cyst. The case is a rare incidence of the two unrelated conditions occurring together in one lesion and also illustrates the implantation theory of epidermal inclusion cyst.…”

Clinicopathologic features of epidermal cysts of the sole: comparison with traditional epidermal cysts and trichilemmal cysts*

“…Therefore, they occur most commonly on the hairbearing areas such as the scalp, face, neck, trunk, and scrotum. 1,2 In addition, they may occur as the result of traumatic implantation of epidermal elements into the dermis at the time of trauma, particularly on the palms and soles, which is rare. 2 They may also arise after some operations such as episiotomy or ritual circumcision.…”