Infantile myofibromatosis is a rare fibrous tumor of infancy that can be solitary or multiple. Although most of the cases are limited to the skin, in some instances systemic involvement can be present. Solitary tumors limited to the skin usually present a good prognosis with spontaneous regression. We performed a retrospective observational review of the clinical and pathologic characteristics of nine patients diagnosed as having infantile myofibromatosis, followed during a 10-year period in a Pediatric Dermatology Department.
We describe two children with acute onset and spontaneous resolution of angioma-like papules during a viral illness. The biopsy specimens from both patients showed a unique histologic appearance consisting of dilated dermal blood vessels with plump, hobnail-shaped endothelial cells. On the basis of the natural history and the histopathologic features we suggest the diagnosis of eruptive pseudoangiomatosis.
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