In infants, fibromatosis usually involves the head, neck and proximal extremities, the background is more myxoid than chondroid, and calcification is rare.

• 在婴儿，纤维瘤病经常累及头部、颈部和邻近的四肢，背景以粘液为主，少量的软骨样间质，钙化罕见。