Ovarian tumors are common in female gerbils with poor reproductive performance. They may present with early cessation of reproduction, decreased litter size, or distended abdomens. All of these signs may also be present with cystic ovaries as well. The skin is the second most affected site for tumors in the gerbil. Squamous cell carcinomas and melanomas are most frequently encountered.
Melanomas have a tendency to develop around the ear, foot, or base of the tail.
The ventral marking scent gland is the third most common site of neoplasia. This gland is located in the mid-abdominal area. It is a hairless, oval tan structure, which tends to be more prominent in males. The gland produces an orange-colored secretion which is used to mark territory. Tumors of this gland appear as 'abscesses' on the abdomen.