pl. n. cells created by fusion of activated lymphocytes with malignant cells. The resulting hybrid cells are cloned and produce antibodies or T-cell receptors, identical to those produced by the parent immune cells. See monoclonal antibody.
HYCOSY (hysterosalpingo-contrast sonography) an out-patient technique that tests for blocked Fallopian tubes. Using *transvaginal ultrasonography following the injection of an echo contrast medium through the cervix, flow along the tubes can be reliably visualized. See also Doppler ultrasound.
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