Raloxifene-induced acceleration of platelet aggregation.

A 59-year-old postmenopausal woman diagnosed to have primary osteoporosis began to take 60 mg daily of oral raloxifene. The platelet aggregation induced by 1 microM adenosine diphosphate (ADP) and the alpha2-antiplasmin activity were accelerated significantly after 8 weeks from the beginning of raloxifene-treatment, and gradually deteriorated up to 24 weeks. ADP markedly caused the phosphorylation of Akt in the platelets obtained at 24 weeks. Although there were no subjective complaints at 24 weeks, the medication was stopped with her consent to avoid any adverse effects due to thrombus formation. The platelet hyper-aggregability and Akt phosphorylation induced by ADP disappeared at 4 weeks after the cessation of medication. These results strongly suggest that raloxifene caused the acceleration of platelet aggregation and subclinical thrombus formation through the Akt signal pathway in this case.

Chondrosarcoma of the distal phalanx of the second toe: a case report.

Although chondrosarcoma is a relatively common malignant bone lesion, these lesions rarely affect the foot. This article presents the case of a 32-year-old woman with a chondrosarcoma in the distal phalanx of the right second toe. Radiography and computed tomography showed cortical disruption and soft-tissue expansion. Histologically, the tumor was classified as grade 2 chondrosarcoma according to the American Joint Committee of Cancer pathologic staging system. Amputation at the distal half of the second proximal phalanx was performed to obtain clear surgical margins. A literature review and discussion of salient diagnostic and treatment issues is included.