MFE-280 was derived from a recurrent, poorly differentiated endometrial carcinoma from a 78 year old patient. Initially, cells were grown as aggregates in suspension for one year, after which they were transferred to monolayer culture. The karyotype analysis revealed near-diploidy with a complex heterogeneous aberration pattern. MFE-280 were found to be positive for cytokines 7, 8, 18 and 19 as well as for vimentin. In addition, the cells express the placental protein 14, PP14. They have been shown to be tumorigenic in nude mice.

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