An affected lymph node will feel hard, rubbery and like a lump under the dog's skin ... The most common sign of mediastinal lymphoma in dogs is difficulty breathing. This is typically due to a mass in ...
In older dogs, a hernia may be mistaken for a soft, fatty lump under the skin. However, some hernias occur internally ... Diaphragmatic hernia: A diaphragmatic hernia affects the diaphragm, which is ...