Juvenile hyalin fibromatosis
Y. Kitano
A boy had multiple large tumors on the scalp, whitish nodules on the nape
and both sides of the neck, hypertrophic gingiva, and severe flexural
contractures of hip and knee joints. The histopathologic structure of the
tumor was characteristic of juvenile hyalin fibromatosis. The tumor cells
were embedded in an amorphous eosinophillic ground substance. X-ray films
revealed numerous osteolytic and osteociastic lesions that are important
findings in the study of this disease.
