[Histonet] Protein U on Breast Panel ???

[histology <@t> gradymem.org]

We had a surgeon order a breast panel with Her2Neu, IR-PR, Ploidy, and 
Protein U.
What is "Protein U"?  We send out for these test but the place we send 
them hasn't heard of Protein U.
Can anyone shed a light on this for me?

Angie Barnett, HTL(ASCP)
Grady Memorial Hospital
Pathology Department
405/224-2258
histology <@t> gradymem.org