Fibrous hamartoma of infancy

A case of fibrous hamartoma of infancy occurring in the scalp of a 14-month-old is described. Light microscopy revealed features similar to those described previously. Electron microscopic studies revealed cells with ultrastructural characteristics of both fibroblasts and possibly myofibroblasts. In addition, occasional fusiform banded fibers (Luse bodies) were identified. This is the first reported case of a fibrous hamartoma of infancy in the scalp and the first description of its ultrastructural features.