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Korean J Hepatol. 2008 Sep;14(3):381-386. Korean. Case Reports.
Lee HJ , Choi JW , Kim TN , Eun JR .
Department of Internal Medicine, Yeungnam University College of Medicine, Daegu, Korea.

Adefovir dipivoxyl (ADV) effectively suppresses hepatitis B virus (HBV) replication but exhibits nephrotoxicity with severe hypophosphatemia when administered at a high dosage. This is the first report of severe hypophosphatemic osteomalacia induced by ADV at 10 mg/day. A 42-year-old man with HBV-related chronic liver disease presented with generalized bone pain, especially in the left ankle. He had been taking ADV for more than 1.5 years following a clinical breakthrough due to lamivudine-resistant HBV. Aggravating severe hypophosphatemia and elevated serum alkaline phosphatase levels with high bone fraction had been noted after 6 months of ADV therapy. Bone densitometry, simple bone X-rays, and a whole-body bone scan demonstrated osteoporosis and multiple areas with hot uptake, especially in the left ankle. All the image findings and symptoms improved after correcting the hypophosphatemia.

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