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1 Four patients receiving platinum-containing chemotherapy were treated with domperidone (20 mg) by slow intravenous injection followed by a continuous infusion for 24 h at a dose of 10 mg 24 h-1 kg-1. Cardiac monitoring and plasma potassium and domperidone concentration measurements were performed. Severe cardiac arrhythmias occurred in two patients. 2 A control group of 14 patients treated with similar chemotherapy, without domperidone, also underwent cardiac and plasma potassium monitoring. No significant arrhythmias were seen. 3 The electrophysiologic effects of domperidone are discussed. 4 It is concluded that treatment with intravenous domperidone is associated with the occurrence of cardiac arrhythmias.

A 54-year-old woman with inoperable metastatic small cell carcinoma (SCC) of the endometrium was treated with cisplatin and etoposide chemotherapy on the basis of the histologic similarity to pulmonary SCC. The response to treatment was monitored using serum neuron specific enolase (NSE) levels. A complete remission was obtained with resolution of symptoms and disappearance of the mass. The patient is alive and well 4(1/2) years later. Considering the aggressive behavior and short survival usually associated with this tumor and the presence of such advanced disease, a complete response to chemotherapy was unexpected. It would appear that chemotherapy should always be considered in the management of metastatic endometrial SCC, even in the presence of large-volume disease.

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