The present invention relates to novel human secreted proteins and isolated nucleic acids containing the coding regions genes encoding such proteins. Also provided are vectors, host cells, antibodies, and recombinant methods for producing human secreted proteins. The invention further relates to diagnostic and therapeutic methods useful for diagnosing and treating disorders related to these novel human secreted proteins. Disclosed embodiments of the invention also include antibodies that bind to secreted protein HHTLF25 and methods for making and using such antibodies.