Tumoral calcinosis--a pathogenetic overview: a histological and ultrastructural study with a report of two new cases, one in infancy.

Tumoral calcinosis occurs as a well-defined pathologic entity in 3 heterologous groups of diseases--hyperphosphatemic familial tumoral calcinosis, normophosphatemic tumoral calcinosis, and secondary tumoral calcinosis. The histological lesion is stereotypic developing from the concurrence of a juxta-articular injury with an elevated calcium-phosphorus product. The reparative response to injury is histiocytic featuring synovial metaplasia forming bursa-like structures that create the characteristic compartmentalization of the lesion.

Premature physeal closure following distal tibia physeal fractures: a new radiographic predictor.

The incidence and predictors of premature physeal closure (PPC) after pediatric distal tibial fractures were investigated. PPC was defined as evidence of growth plate disturbance on the injured side compared with the uninjured side. Ninety-two fractures were reviewed with at least 1 year of follow-up, or until physiologic closure of the growth plates.