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Papillomavirus-infected epidermoid cysts
This is one the first reports of a papillomavirus-infected epidermoid cyst in a site other than plantar skin. Light microscopic features of our cases differed from those of the plantar cysts. Epidermoid cysts may be induced by the papillomavirus or the virus may merely infect pre-existing cysts
Mycosis fungoides and eruptive epidermoid cysts: a unique response of follicular and eccrine structures
A case of a patient who developed simultaneously mycosis fungoides (MF) and multiple, tiny eruptive cutaneous cysts on the face, neck and upper part of the trunk is reported. Histologically and immunohistochemically MF infiltrate was recognized not only in the upper part of the dermis and in the epidermis but also around and within the walls of cystic lesions. Furthermore, the eccrine structures were also involved by MF infiltrate. We emphasize that MF infiltrate can affect the follicular and eccrine structures inducing the formation of keratinous cysts. The clinical appearance of the facial lesions may be confused with Favre-Racouchot disease
Agminated Spitz nevi occurring within a congenital speckled lentiginous nevus
A 40-year-old woman had a speckled lentiginous nevus on her thigh since birth. During her first pregnancy, additional papules and nodules appeared within the preexisting hyperpigmented area, histologic examination of which showed features of both junctional and compound Spitz's nevi accompanied by simple lentigolike changes. In this particular case, speckled lentiginous nevus may have constituted a particular environment for the production of multiple Spitz nevi
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