osteitis fibrosa

secondary to hypocalcemia and hyperphosphatemia followed by increased parathormone production

subperiosteal bone resorption
- radial aspect of phalanges, distal clavicle, medial tibia plateau, medial humerus neck, distal ulna, phalangeal tufts, lamina dura of teeth
subchondral and subligamentous bone resorption
- widening of symphysis pubis, SI joints
- resorption of ischial tuberosity
spotty deossification of the skull ("wooly", "salt and pepper")
metaphyseal fractures, slipped epiphyses
brown tumor + chondocalcinosis
- more common in primary hyperparathyroidism