Uterine Adenocarcinoma in a Rabbit

Uterine Adenocarcinoma in a Rabbit
 
History:  An 11 year old intact female rabbit  had a chronic history of Pasteurella multocida snuffles and head tilt which had resolved.   Her owner noticed she started to have increased abdominal component of respiration which progressed to open mouth breathing.  A mass was palpated in the caudal abdomen during examination. 
 
Gross Necropsy: 
The lungs were almost [...]