An enlarging tender nodule on the finger of a 4-year-old boy: an unusual presentation of infantile myofibromatosis.

Infantile myofibromatosis is a benign neoplasm most commonly seen in the neonatal period through infancy. We report a case of a 4-year-old boy who had a nodule on his left index finger. Biopsy specimen showed features of infantile myofibromatosis (solitary type). Unusual features of this case included location and the concept of an infantile myofibromatosis/infantile hemangiopericytoma continuum.