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 Nov. 18, 1954, a Pomeranian dog with an abdominal enlargement was admitted to the Stange Memorial Clinic. The dog was approximately 12 years old and quite alert considering the extensive mass that could be palpated in the abdominal cavity. The mass had rapidly enlarged during the last 6 months, causing dyspnea and cardiac distress. A guarded prognosis was given to the owner, and he was informed that surgical exploration was indicated.
"Massive Teratoma in a Pomeranian Dog,"
Iowa State University Veterinarian: Vol. 17
, Article 8.
Available at: https://lib.dr.iastate.edu/iowastate_veterinarian/vol17/iss2/8