Osteitis Fibrosa Cystica

Osteitis Fibrosa Cystica is a condition that affects the bones due to an imbalance in calcium regulation. It occurs when the body produces too much parathyroid hormone (PTH), which causes bones to lose calcium and become weak. This leads to bone pain, fractures, and deformities. The condition primarily involves the skeletal system and can cause cyst-like spaces in the bones. It is often a result of an overactive parathyroid gland, which controls calcium levels in the blood. The weakening of bones can significantly impact mobility and overall health.

Osteitis Fibrosa Cystica is a skeletal disorder characterized by increased osteoclastic bone resorption due to elevated levels of parathyroid hormone (PTH), typically from primary hyperparathyroidism or secondary causes like chronic kidney disease. The excessive PTH stimulates osteoclasts, leading to bone demineralization, fibrous tissue replacement, and formation of brown tumors (osteoclastomas). This results in bone pain, subperiosteal bone resorption, and skeletal deformities. The condition reflects severe, prolonged hyperparathyroidism and is a major cause of pathological fractures and skeletal complications. Radiographically, it shows characteristic subperiosteal resorption and cystic bone lesions. It is important to recognize as it indicates advanced metabolic bone disease.