1/10. osteoradionecrosis of the hyoid bone: a report of 3 cases.PURPOSE: osteonecrosis of the hyoid bone is an uncommon disease that has only been described occasionally in the literature. MATERIALS AND methods: We report 3 cases of osteonecrosis of the hyoid bone after radiation therapy for carcinoma at various sites in the head and neck region. RESULTS: Imaging computed tomography (CT) scans were performed for all 3 cases and did aid in the diagnosis. In 1 case, a 201thallium scintigraphy and a bone scan (99mtechnetium-diphosphonate) were performed and this confirmed the diagnosis of osteoradionecrosis. CONCLUSION: osteoradionecrosis of the hyoid bone may be misdiagnosed as recurrent neoplasm. Although recurrent or persistent neoplastic disease must initially be ruled out, it is subsequently important to correctly identify osteonecrosis of the hyoid bone, because its surgical treatment is simple and the prognosis is good.- - - - - - - - - - ranking = 1keywords = osteonecrosis (Clic here for more details about this article) |
2/10. osteonecrosis after arthroscopic meniscectomy using radiofrequency.The purpose of this report is to describe a case of osteonecrosis that occurred after arthroscopic meniscectomy associated with a radiofrequency device. The patient developed increasing knee pain and disability 6 months after arthroscopic meniscectomy. magnetic resonance imaging showed subchondral osteonecrosis of both femoral condyles with cyst formation.- - - - - - - - - - ranking = 1keywords = osteonecrosis (Clic here for more details about this article) |
3/10. Cystic brain necrosis and temporal bone osteoradionecrosis after radiotherapy and surgery in a patient of ear carcinoma.brain cyst formation of temporal lobe induced by radionecrosis in ear carcinoma is rare. A 73-year-old man with basosquamous carcinoma of the left external ear canal received excision of tumor and postoperative radiation therapy in 1992. For osteonecrosis of the left temporal bone, a series treatment including oral and intravenous antibiotics and hyperbaric oxygen therapy was given in following years. Encephalomalasia of the left temporal lobe on brain computed tomography (CT) was noted in 1997. The patient suffered from headache, poor concentration, memory impairment, depressed mood, bad temper, and one 8 x 5 x 3.5 cm cystic lesion of the left temporal lobe with tempomandibular joint defect revealed by brain CT in 2001. Symptoms relieved after stereotactic aspiration of cystic fluid and external drainage (Omaya reservoir) insertion under magnetic resonance image by neurosurgeon. We report the progressive radionecrosis of temporal lobe and cyst formation, which caused the neuropsychological symptoms 10 years after radiotherapy.- - - - - - - - - - ranking = 0.5keywords = osteonecrosis (Clic here for more details about this article) |
4/10. Prosthodontic treatment during active osteonecrosis related to radiation and bisphosphonate therapy: a clinical report.osteonecrosis of the jaws following the use of bisphosphonate drugs has been reported in the literature. Presently, there is limited evidence to establish guidelines for the prosthodontic management of patients with active osteonecrosis, a history of osteonecrosis, or medical history of using these medications. This clinical report reviews the current literature regarding bisphosphonate use, and reports the prosthodontic treatment of an edentulous patient with active osteonecrosis who had a history of oral bisphosphonate use and jaw irradiation.- - - - - - - - - - ranking = 3.5946141642835keywords = osteonecrosis, bisphosphonate, jaw (Clic here for more details about this article) |
5/10. osteoradionecrosis of sphenoid and temporal bones in a patient with maxillary sinus carcinoma: a case report.A case of radionecrosis of sphenoid and temporal bones is reported. The patient received a combination of surgery, radiotherapy, and chemotherapy for his left maxillary sinus carcinoma. After the combined therapy, necrosis accompanying inflammation developed in the maxillary and temporal regions. Excision of the necrotic tissues was done, and the left ascending ramus of the mandible was resected because of persistent tumor mass at the left infratemporal fossa. Although the excision wound of the maxilla healed by epithelialization, an area of nonvital bone remained exposed in the temporal region, where progressive osteonecrosis with infection led to breakdown of the skin. The necrotic bones of the zygomatic arch and the sphenotemporal sutural region became visible through the skin defect, and computerized tomography scan revealed bone necrosis involving the inferolateral area and the base of the skull. Excision of the necrotic bone and reconstruction with sternocleidomastoid myocutaneous flap were performed.- - - - - - - - - - ranking = 0.5keywords = osteonecrosis (Clic here for more details about this article) |
6/10. osteoradionecrosis, pathogenesis, treatment and prevention.The present paper discuss the development of osteoradionecrosis (ORN) in the jaws. ORN is the end stage of tissue injury induced by irradiation. The most prominent etiologic factor of ORN seems to be the effect of radiation on endothelial cells lining the vessels. These cells are, as tumor cells, highly radiosensitive, and radiation leads to a vascular damage resulting in hypoxic, hypovascular and hypocellular tissues. wound healing in such tissues is impaired since nutritional demands of the wound, including oxygen, cannot be supplied due to the degenerative changes in the blood vessels. The paper furthermore describes the scientific basis for the use of hyperbaric oxygen therapy (HBO) in ORN. HBO increase the vascularity in the tissues injured by radiation, and thus tissue viability and healing capacity is increased reducing the risk for spontaneous or traumainduced ORN. Protocols for the treatment of patients with ORN are presented and prophylactic guidelines are described.- - - - - - - - - - ranking = 3.5549488968314E-5keywords = jaw (Clic here for more details about this article) |
7/10. radiation induced fracture of the scapula.A case of radiation induced osteonecrosis resulting in a fracture of the scapula in a 76-yr-old female patient with a history of breast carcinoma is presented. diagnostic imaging, laboratory recommendations and clinical findings are discussed along with an algorithm for the safe management of patients with a history of cancer and musculoskeletal complaints. This case demonstrates the necessity of a thorough investigation of musculoskeletal complaints in patients with previous bone-seeking carcinomas.- - - - - - - - - - ranking = 0.5keywords = osteonecrosis (Clic here for more details about this article) |
8/10. osteonecrosis of hyoid bone and thyroid cartilage.A 55-year-old man with carcinoma of the right pyriform fossa was treated with cobalt therapy. Subsequently, osteonecrosis of the right greater horn and the right superior horn of the thyroid cartilage developed, followed by pathologic fractures of the processes and spontaneous expulsion of the sequestrae.- - - - - - - - - - ranking = 0.5keywords = osteonecrosis (Clic here for more details about this article) |
9/10. Extensive late bone necrosis after postoperative orthovoltage irradiation of breast carcinoma. Report of a case.Extensive osteonecrosis of the clavicle, scapula and humerus was observed in a patient treated postoperatively 22 years earlier, with 250 kV roentgen rays, for breast carcinoma. Retrospective calculations based on the absorption in soft tissue and bone revealed very high absorbed doses in the bone (about 120 Gy).- - - - - - - - - - ranking = 0.5keywords = osteonecrosis (Clic here for more details about this article) |
10/10. Maxillary osteonecrosis after radiotherapy for nasopharyngeal carcinoma.A case of extensive osteoradionecrosis of the posterior maxillae, pterygoid plates and floor of the sphenoid sinuses is reported. The patient received more than one full course of radical radiotherapy for nasopharyngeal carcinoma. Although there was complete remission of the tumour, she suffered from repeated episodes of gum bleeding which was found to be due to oroantral fistulas and severe dental decay. The large fraction dose and total dose, severe dental caries and xerostomia are the most likely contributory causes to this unusual complication in our patient.- - - - - - - - - - ranking = 2keywords = osteonecrosis (Clic here for more details about this article) |
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