| neoplasm circulating cells | Exfoliate neoplastic cells circulating in the blood and associated with metastasizing tumours. (12 Dec 1998) |
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| thymic factor, circulating | <chemical> A thymus-dependent nonapeptide found in normal blood. Stimulates the formation of e rosettes and is believed to be involved in T-cell differentiation. Chemical name: Thymulin (12 Dec 1998) |