On June 28, 1946, a 3-year-old Hereford cow was admitted to Stange Memorial Clinic with the history of a tumor protruding from the vagina.
Howard, Richard T.
"Chronic Prolapse of the Vagina,"
Iowa State University Veterinarian: Vol. 9
, Article 9.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol9/iss1/9