NCIt definition : A benign, localized, nodular and well-circumscribed neoplasm usually seen as a congenital
neoplasm or in the first year of life. It is characterized by a biphasic growth pattern
and is composed of small, undifferentiated mesenchymal cells associated with branching
thin-walled vessels and more mature neoplastic spindle cells with abundant eosinophilic
cytoplasm in a collagenous stroma.;