[Pathologic fracture of the femur due to primary hyperparathyroidism].

Pathologic fractures are not commonly described in primary hyperparathyroidism. A 31 year old male with primary hyperparathyroidism developed severe hypercalcemia and cystic osteitis. Bone pains and a fracture of the femur followed. A parathyroid adenoma was demonstrated by ultrasonography. After resection of the tumor, a normalization of serum Ca levels and clinical recovery took place.