Osteitis fibrosa cystica (OFC) is a skeletal disorder caused by an overproduction of parathyroid hormone from the overactive parathyroid glands. Osteitis fibrosa cystica is the late manifestation of the hyperparathyroidism. The incidence of bone lesions has decreased from 80% in the past to 15% in the present. Symptoms are due to bone softening and hypercalcemia, which might include bone mass or fractures, kidney stones, peptic ulcer, weight loss, nausea, loss of appetite, psychic moans, and abdominal groans.