Internal medicine specialists care for pets with complex medical problems including respiratory, gastrointestinal, kidney, heart, endocrinology, blood disorders and cancer. They are highly trained to perform endoscopy of the nasal cavity, lungs and gastrointestinal tract. Internists often place feeding tubes and oversee specialized nutritional management. They will work with your primary care veterinarian to interpret complicated laboratory results. As part of hematology/oncology case management, a bone marrow evaluation or tissue aspirates may be performed. Chemotherapy and drug infusions are managed by Internists and carried out by highly trained nurses.