6788. Monocytosis in an old dog with hair loss

 

A large increase in monocytes, called monocytosis, in an old dog often means the body is fighting a long-term infection, chronic inflammation, tissue damage, or certain types of cancer like leukemia or immune-mediated diseases. It is a sign that the immune system is working hard.

Causes of Monocytosis

Chronic infections: Fungal or bacterial issues that last a long time.
Immune-mediated disease: The body attacks its own cells.
Tissue necrosis: Dead or dying tissue from injury or tumors.
Neoplasia: Cancers like lymphoma or monocytic leukemia.
Stress or steroids: High stress levels or certain drugs.

Next Steps for Care

See a vet: Get a full physical exam.
Run more tests: Do blood panels, X-rays, or an ultrasound.
Find the root cause: Treat the specific disease or infection found.