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Updated chapter to come.
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Primary Indications in Patients with Cancer
To protect bone from new metastatic lesions
To treat hypercalcemia of malignancy
To prevent treatment-related bone demineralization, osteolysis, and pathologic fractures
To treat osteolytic lesions, decrease the incidence of pathologic fractures, prevent skeletal deformities, and prevent and decrease the severity of pain
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Intravenous Versus Oral Bisphosphonates
Intravenous
Much more effective than oral agents at reversing hypercalcemia and relieving bone pain, particularly in patients with breast cancer and multiple myeloma
Can overcome disadvantages associated with oral agents, including poor absorption from the GI tract (<3% oral bioavailability); have a lower incidence of adverse GI events
Require clinic/hospital administration
Oral
Convenient
Absorption can be impaired by food and beverages other than water
Associated with greater incidence of upper GI toxicity than with intravenous administration, including dysphagia; esophagitis; and esophageal, gastric, or duodenal erosion; ulceration; and perforation
Body JJ et al. J Clin Oncol 1998;16:3890–3899
Riccardi A et al. Tumori 2003;89:223–236
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3. +
Purohit
OP
et al. Br J Cancer 1995;72:1289–1293
6. +
Singer
FR
et al. Arch Int Med 1991;151:471–476
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The American Society of Bone and Mineral Research Task Force has defined osteonecrosis of the jaw (ONJ) as the presence of exposed bone in the maxillofacial region that does not heal within 8 weeks after identification by a healthcare professional1
Potential risk factors for developing ONJ in patients with cancer2:
Poor oral hygiene and periodontal disease3
History of dental procedures for extractions or denture use (that may cause soft tissue injury)
Prolonged exposure to high doses of intravenous bisphosphonates
Intravenous bisphosphonate use poses greater risk than oral bisphosphonates
Zoledronic acid seems to cause more ONJ compared to pamidronate4
ONJ developed in 7% to 10% of patients with myeloma and 4% of patients with breast cancer
Among patients on oral bisphosphonates (eg, alendronate), there is a very low risk (estimated at 0.7 cases of per 100,000 person-years exposure) of developing bone osteonecrosis...