Epidermal Cyst on the Sole
نویسندگان
چکیده
475 subcutaneous layer. The lesion was extirpated and closed primarily. Macroscopically, there was the typical appearance of the epidermal cyst with a white cystic wall and cheesy material (Fig. 2). The histopath ological section showed that it was an epidermal cyst (Fig. 3). A 15yearold girl was referred for treatment of a palpable lesion that had been on the sole of her left foot for 2 months. There was no known history of trauma to the sole. The lesion was painful on walking. Physical examination showed that there was not elevated, but was a round, movable, palpable nodule 1 cm in diameter, overlying the third metatarsal. A mild callus had formed overlying the lesion (Fig. 4). The foot sonography showed that there was an oval heterogeneous hypoechoic mass in the subcutaneous layer (Fig. 5). A white cystic lesion with thick, white exudate was extirpated and closed primarily. The histopathological report was an epidermal cyst. Epidermal cysts on the sole and plantar epidermal cysts are thought to occur following traumatic im plantation of epidermal cells into the dermis [13]. The soles receive continuous mechanical pressure during standing, walking, and running. Lemont [3] reported a histologic review of 120 keratinous cysts of the foot. The locations of all the epidermal cysts were plantar, with the greatest number on the lateral borders of the sole. Most of the patients with plantar epidermal cysts were 20 to 35 years of age. Lemont [3] suggested that this result showed that varusfunc tioning feet are common at young ages and the lateral borders of the feet are more susceptible to the shearing Epidermal Cyst on the Sole
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