A Case of Solitary Adult Type Myofibroma

Solitary myofibroma is a recently described, uncommon neoplasm of superficial soft tissue and presenting as an asymptomatic nodule of the skin, which mainly occurs in adults. It was thought to be the adult counterpart of infantile myofibromatosis. Although it has histopathological similarity to infantile myofibromatosis, it shows a discrete clinicopathological entity compared with infantile form on the basis of its much later onset, superficial location, invariable solitary occurrence and uniformly benign behavior. A 41-year-old female presented a skin lesion on the posterior neck for 1 year, which was a solitary, painless nodule. The excised tumor was diagnosed as myofibroma by light microscopy and immunohistochemistry. (Korean J Dermatol 2004;42(6):767-770)