Lymphoma:
Affects ferrets in any age with single organ or multi organ involvement. It may be caused by a virus. The survival rate after diagnosis is from 2 months to 5 years.

Symptoms: Lethargy, anorexia, weight loss, vomiting, enlargement of organs without fever.

Diagnosis: X-ray and biopsy.

Treatment: Surgically remove the tumor and chemotherapy.

Adrenal Gland Tumor
Affects middle aged and older ferrets.

Symptoms: Losing hair on tip of tail and both sides of abdomen, lethargic behavior.

Diagnosis: Physical appearance, blood work, and ultrasound.

Treatment: The best treatment offered at this point is surgery. Tumor can be controlled by medical therapy.

Pancreas tumor (insulinoma):
Affects middle aged and older ferrets. Most of the time insulinoma accompanies an adrenal tumor.

Symptoms: Lethargic behavior and coma if the ferret does not eat for more than 4 hours.

Diagnosis: Check the ferret's blood glucose after the period of not eating.

Treatment: Surgical removal of the tumor or medical treatment.