A case of osteitis deformans of Paget is reported, which presents several unusual features,—namely:
1. Fracture through upper third of femur from a trivial cause.
2. A rapid and uneventful convalescence.
3. Prompt union of the fracture with profuse callus formation.
4. Early return of function with full weight-bearing in eight weeks' time.
In view of the fact that in cases of osteitis deformans there are in the thickened cortex of the bone intermingled areas of rarefaction and sclerosis and a positive balance in the intake and output of calcium, it is apparent that there is an increase in bone metabolism. Therefore, it is not surprising that, in cases of fracture in such patients, prompt union occurs with hyperproduction of callus.