Iowa State University Veterinarian Records, RS 22/6/0/9, University Archives, Special Collections Department, Iowa State University, http://www.add.lib.iastate.edu/spcl/arch/rgrp/22-6-0-9.html
On July 26, 1954, a 2-year old Holstein cow with a very large pendulous udder entered the Stange Memorial Clinic. It was noticed that the swelling had extended dorsally from the udder into the flank area of the right side. It appeared that the suspensory ligaments were also broken down.
Cowger, Robert C.
"Hematocyst of the Udder in a Cow,"
Iowa State University Veterinarian: Vol. 17
, Article 7.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol17/iss1/7