| Popis: |
The diagnosis of osteolytic lesions of the jaws can be challenging. Case Reports: Two cases of brown tumor of hyperparathyroidism were reported. A 76- year-old female patient presented with indolent swelling of her right lower jaw measuring approximately 5 cm /6 cm. The panoramic radiograph showed a well-defined osteolytic radiolucency involving the entire mandibular symphysis. Blood investigations revealed High level of parathyroid Hormone (PTH): 102pg/ml. The diagnosis of a brown tumor of hyperparathyroidism was suspected. A parathyroid technetium scintiscan revealed abnormally high uptake at the lower pole of the thyroid lobe interpreted as hyperplasia of right inferior parathyroid gland with possible brown tumor of the mandible. Second case: A 36- year-old female patient presented for the replacement of her missing teeth. Her medical history revealed chronic renal failure and a recent surgical excision of an Osteitis fibrosa cystica of her fifth left proximal phalange. Panoramic radiograph showed multiple well defined osteolytic lesions of the mandible. The diagnosis of a brown tumor of the mandible secondary to hyperparathyroidism was suspected. Laboratory investigations showed increased PTH level, serum hypocalcemia and hyperphosphatemia and vitamin D deficiency. The patient was referred to the department of endocrinology for further investigation and the correction of PTH level. At Six months follow up all the lesions disappeared on radiological control. Discussion: Brown tumor of hyperparathyroidism is a metabolic disorder causing bone resorption that can affect the jaw bones. Clinical symptoms depend on the size and the location of the lesion. Radiographically, it appears as radiolucent unique or multiple well-defined intra-osseous radiolucency. Biological examination is the key to the diagnosis and it is marked by high level of parathyroid hormone (PTH). Key words: Jaw, Tumors, Osteitis Fibrosa Cystica, Hyperparathyroidism, Diagnosis. |
